Inherently, no. But they are when they decide to affect our culture with theirs. When traditional families are snidely called "breeders" and the foundations our society that have endured for centuries are derided then yes, they are a danger to us. I have known and liked many gay people but it's the militant gay agenda I don't like.
The gay activists, while vocal, are a tiny minority of the gay community. Most gays mind their own business.