Christians are not supposed to judge, only your God is supposed to. In the constitution, it states "Freedom of Religion." I guess people that believe in Buddhism, Hinduism, etc. are going to hell I suppose right? If your a real "Christian" then you don't judge people by their religion, sexuality, etc. It says so in your Bible that only God is to judge when the day comes.
Sorry but Paganism was around 1500 years before Christianity was born.
Jesus commanded, "Do not judge according to appearance, but judge with righteous judgment" (John 7:24). So your conclusion that all judgment is forbidden is incorrect. You yourself judge others because you concluded that Christianity opposes Buddhism and Hinduism. That conclusion required a judgment on your part. As Jesus as said, "For with what judgment you judge, you will be judged; and with the measure you use, it will be measured back to you" (Matthew 7:2).
What you miss is that Christians do not speak against fornication, adultery, homosexuality, Buddhism, Hinduism, or Islam because we personally decided that we do not like those things. We accept the fact that God said they are wrong for various reasons. God made the judgment, our duty is to tell that message to a world who react by putting their fingers in their ears. In this regard, we follow our Lord's leading, "I can of Myself do nothing. As I hear, I judge; and My judgment is righteous, because I do not seek My own will but the will of the Father who sent Me" (John 5:30).
Obviously, the age of a religion does not make it right or wrong. God determines how He desires to be worshiped and it is our responsibility to obey. "Let us hear the conclusion of the whole matter: fear God and keep His commandments, for this is man's all" (Ecclesiastes 12:13). Besides, true worship of God began at the Creation of the world (Genesis 4:4). Paganism is a corruption of true worship by mankind. "Truly, this only I have found: that God made man upright, but they have sought out many schemes" (Ecclesiastes 7:29).