Why do Christians think they can sin and not go to hell?

Answer:

Do you judge a religion base on what it teaches, or how some, who claim the religion, practice it? For example, do I judge Islam based on the teachings in the Koran or by the militant extremists who claim that are faithfully following that book?

The pictures of Jesus and other people from the Bible are all imaginary. There are no images of anyone in the Bible that comes from that time period.

The New Testament does teach head covering for women during prayer and prophesying in I Corinthians 11:1-16. See: The Message of I Corinthians 11 and Why do some women not wear a head covering? Most of the Christian religions you've run across are Roman Catholics and the older practitioners of Catholicism do practice head covering, but as you've noticed it is fading out in the newer generations.

Beards have never been a requirement in Christianity or Judaism for that matter. See: Is it a sin to shave off one's beard? Therefore, whether a man has or does not have a beard tells you nothing about his faith.

Regarding the various translations, see: Why are there so many translations? Those in control of the Muslim religion took a different approach, while we know from history that there were several texts of Mohammed's saying written, after his death all but one text was destroyed. See: Answering a Muslim Critic under the section titled "Do We Have the Original Manuscript of the Koran?" While translations exist of the Koran, believers are told they must learn ancient Arabic in order to truly understand their prophet's teachings. Christians work hard to make the Bible easily available to anyone in their own language. A side-effect of the Christians' approach is that the various translations and manuscripts can be compared to spot possible flaws. After all, "By the mouth of two or three witnesses every word shall be established" (II Corinthians 13:1). In regards to which English translations have a reputation of being accurate, see: Which Bible translations are the best?

Just as there are many views of the teachings of Mohammad, such as between the Sunnis and the Shi'as, there are has been divisions in Christianity due to men introducing their own ideas. One false teacher who gained a wide following was John Calvin. Calvin lived back in the 1500s. He taught that God decides who will be saved or lost and that nothing a person does will change that decision. Even people who don't accept Calvin's teachings are sometimes influenced by him. Therefore, I'm not surprised that you've run across people who call themselves Christians, who don't follow the teachings of Christ, but still tell themselves they will be saved regardless. Unfortunately, that is not what the Bible reveals. "But because of your stubbornness and unrepentant heart you are storing up wrath for yourself in the day of wrath and revelation of the righteous judgment of God, who will render to each person according to his deeds: to those who by perseverance in doing good seek for glory and honor and immortality, eternal life; but to those who are selfishly ambitious and do not obey the truth, but obey unrighteousness, wrath and indignation. There will be tribulation and distress for every soul of man who does evil, of the Jew first and also of the Greek, but glory and honor and peace to everyone who does good, to the Jew first and also to the Greek. For there is no partiality with God" (Romans 2:5-11).

Sexual sins, including fornication (having sex with someone you are not married to) and adultery (being married and having sex with someone else), are condemned by God. "Marriage is to be held in honor among all, and the marriage bed is to be undefiled; for fornicators and adulterers God will judge" (Hebrews 13:4). Jesus also taught that marriage is for the lifetime of the man and woman who marry each other. "And He answered and said to them, "Have you not read that He who made them at the beginning 'made them male and female,' and said, 'For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh'? So then, they are no longer two but one flesh. Therefore what God has joined together, let not man separate" " (Matthew 19:4-6).

Yes, the Bible does talk about a day of Judgment. "But by His word the present heavens and earth are being reserved for fire, kept for the day of judgment and destruction of ungodly men" (II Peter 3:7). And the Bible does teach that there is a place called Hell, also called "the second death." "But for the cowardly and unbelieving and abominable and murderers and immoral persons and sorcerers and idolaters and all liars, their part will be in the lake that burns with fire and brimstone, which is the second death" (Revelation 21:8).

Compared to Judaism, Christian has very few restrictions on eating. "For it seemed good to the Holy Spirit and to us to lay upon you no greater burden than these essentials: that you abstain from things sacrificed to idols and from blood and from things strangled and from fornication; if you keep yourselves free from such things, you will do well" (Acts 15:28-29). "For everything created by God is good, and nothing is to be rejected if it is received with gratitude; for it is sanctified by means of the word of God and prayer" (I Timothy 4:4-5).

In regards to things to drink, the casual or recreational use of alcoholic drinks is forbidden to Christians. "For the time already past is sufficient for you to have carried out the desire of the Gentiles, having pursued a course of sensuality, lusts, drunkenness, carousing, drinking parties and abominable idolatries" (I Peter 4:3). The reason is simple: Alcohol clouds the mind, making it easier to make bad decisions. Christians are to remain sober and alert against sin. "But you, brethren, are not in darkness, that the day would overtake you like a thief; for you are all sons of light and sons of day. We are not of night nor of darkness; so then let us not sleep as others do, but let us be alert and sober. For those who sleep do their sleeping at night, and those who get drunk get drunk at night. But since we are of the day, let us be sober, having put on the breastplate of faith and love, and as a helmet, the hope of salvation" (I Thessalonians 5:4-8).