Sex is designed by God to be within the bounds of Marriage, and between a man and a woman only. Yes, we all fail to live up to God's standard but that's why Jesus gave up His life for us, to give us forgiveness and purity before God. 

LGBT folks are loved and forgiven by God, just as heterosexuals are. God commends his love toward us, in that, while we were yet sinners, Christ died for us. As I see it, the problem arises when some LGBT's seek to justify their sin, and call it something else. That's no different than me attempting to justify my own heterosexual sins, is it?