Those people don’t feel threatened by the groups they dislike when those groups are suppressed sufficiently to not cross into the mainstream. Pride used to be a San Francisco thing, Hispanics and other various ‘Brown people’ stayed in their own parts of towns, etc. As those groups make further inroads into ‘mainstream’ the groups who used tho think they were the majority, the racists and homophobes, etc, (or, maybe were the majority if you look back far enough) who saw those groups as an inconvenience now see them as an active threat and are responding accordingly, lashing out at any soft target that presents itself.