It can certainly be influenced, in that sexuality isn't black and white, but rather a shade of grey with parts that can be particularly embraced. I think it's all rather complex and we aren't quite sure of all the biological and environmental triggers. Either way, the idea that the teaching of homosexuality in schools is gaying up kids is a little extreme; if anything it's just allowing those who would have eventually wound up identifying themselves as gay to do so a little earlier, knowing there's nothing wrong with it.

) when judging the Bible or what it is supposed to be, which ultimately is as a guide to an individuals spirituality and relationship with their God. Because of the nature of the Bible it is practically impossible to say this or that is definitively the purpose of the bible, as that is subjective to the individual to a great extent and in a good many cases what American (and others) Evangelicals believe has little to do with the Bible and everything to do with their politics and prejudices.
All available evidence isn't much, considering what I've already pointed out. What bearing you think it may have on their sexuality is therefore as valid as mine.