Why do people look down upon non-virgins?

a lot of so called christians say that us non-virgins are going to hell because we had before marriage. ironically enough, the bible says 'judge not for ye who shall be judged,' so i wonder where do these so called christians get off judging others and at the same time saying that they are good christians? as far as your opinion, i think it's nice that you are actually open minded and anyone who calls you a douche, is a douche themselves.