My parents are/were anti-gay who thought Enoch Powell talked a lot of sense. I certainly haven't inherited those views although I probably held them briefly as a child when you haven't had a chance to see other options and viewpoints - I am a socialist but I don't intrinsically despise rich people, Tories or indeed people who hold what I consider bigoted views. I prefer to engage in a debate where I try to persuade them that a more humanist and tolerant view of people's situation and lifestyle choice is better for everyone.
If being tolerant of people's choice of religion, sexuality or skin colour is currently fashionable then thank God (or perhaps not, if you are agnostic or atheist) for that.
The thing that drew my comment was the word "enlightened", which we usually associate with being more tolerant, as you imply, and perhaps more tolerant than our parents were.
On the other hand, some prejudices seem to be more acceptable, including, among other things, prejudices against organised religion, or against people who hold certain opinions that don't coincide with the majority.
I've always thought that there are some people who love to hate, but are able to pick their targets so that their hatred won't lead to them being ostracised.