The thing about the Bible is that there is no one true interpretation of it. Every Christian person has a different understanding of it. I think it's perfectly fine to believe in whatever you want to believe in, so long as it does not hurt other people or stops them from having certain rights (gay marriage being an important example). You can judge a person however you'd like as well, but to tell them that their choices or decisions is wrong based on your own understanding of the Bible is unfair.