i absolutely agree that it is a CHRISTIAN thing not a denominational thing....Pentacostals in general do have a more "confronting" way of doing things...perhaps this is what you're picking up on? But as far as judgement....I converted from Catholicism, and let me tell you, there is JUST as much if more judgement with catholicism as there is with pentacostal churches....the way I was treated was actually quite cruel.
I think its dangerous to single out ONE denomination above another and say "they're the most judgemental" or even "they're MORE judgemental" because even if you have been to a variety of denoms, you've only been to so many CHURCHES in those denoms, and indivdual churches do vary quite considerably in their attitudes, values, and overall treatment of other people. I can only speak for my own CHURCH within my denom..and Im not even going to say what my denom IS because I don't think it matters, but I really do love my church...they're beautiful and very very accepting and loving, and the one thing I love the most is that they lead by example rather than by judgement. Not all churches are like that, I know. I just dont think its wise to lump all pentacostal churches in together, because just the TERM pentacostal covers SUCH a broad range of SUB denominations that you really cant be accurate in your assessment.
This aside, i am sorry that your experiences are that of judgement rather than love. It is unfortunate, sad, and a product of a broken world that we don't always treat eacother the way we should. I hope that your relationship with God goes from strength to strength despite the judgement of others.