Unfortunately this horse seems to have squeezed out so we now have to go back and argue out why racism, homophobia, mysogyny, and every other form of bigotry is bad, at best so that we can once again eliminate those until-recently-unacceptable ideas from civil discourse and marginalize those who espouse them, or at worst as the beginning of an ongoing effort since that may not be possible anymore.
Well, first, if you think that type of thought had gone away or become completely or even largely eliminated from public discourse, they you have led a sheltered life my friend.
There's an old saying that still holds true to a large part in the US..."When does a black man become a n1gg er? About 30 seconds after he leaves the room.
It is largely true that people freely talk that way still despite you thinking it had disappeared.
Now, that being for sure is an EXTREME example....the actual terms "racism, homophobia, mysogyny" have been throw about so liberally and freely by the left in recent years, that they have lost almost all meaning. People that aren't scared of homosexuals (homophobia), that don't really want to interfere in how two grown consenting adults conduct themselves, but merely say they disagree with that lifestyle and question if it is choice vs biological (where's the gay gene)...they get brand Homophobes or anti-gay.
Even if you disagree with that viewpoint, you shouldn't try to to brand one as extreme.
What I'm saying is, there still is a WIDE breadth of views out there on race, sexuality and peoples' places in society. If you disagree with someone, don't shout them down, but try to reasonably argue your point.
And do admit at some time, neither will fully change their mind and you have to live with that....
But one of your main points was you thought that anything but leftist thoughts on race, religion, sexuality had largely been eradicated, is false.
I can assure you, once a minority of any type has exited the room, peoples' true feelings have been and continue to be expressed about them.
When you try to suppress that, then, you never know when someone truly has those views and you lose your chance to try to converse with and change their views.
And trust me, "racism, homophobia, mysogyny, and every other form of bigotry" are NOT confined to the far-right. All types of thinking pervades all ends of the political spectrum.