Is being LGBT because of a curse?

I am currently 19 and since I was little I have seen the position of this religion towards this community, but a long time ago I heard the talk of some relatives who said that being part of that community is because God sent you a curse, even that a few years ago they even gave an explanation on one of the leader's tours. But I totally disagree, since my social circle is mostly made up of these people who are called “damned.” I don't know where these ideas come from and they are clearly not based on the Bible, which is their "main" rule of faith. I hope someone can answer my question where this ugly idea they have comes from.