Problem is, people define different things as racist, and homophobic, and bigoted.................
As a pp said, there is a world of difference between someone hating on/beating up gay men and women, and using the N word, and deplorable behaviour like making monkey noises and throwing bananas onto the football pitch etc................. and someone like that woman a pp mentioned, who expressed a genuine concern (to Gordon Brown,) about the number of immigrants coming over to the UK.
I deplore racist and homophobic behaviour, and think genuine racism and homophobia and bigotry should be called out. However, there does seem to be a hardcore of certain people, usually young, but not always, as I know a few 40 to 60 year olds like this, who call 'racist!' if someone says they disagree with so many illegal immigrants (on the boats) being allowed into the UK when we have so many of our own to look after. And they are called bigoted and hateful, if they use the wrong terminology... (Regarding a person's skin colour, or sexual orientation, or disability etc....) Many people who do use the wrong terminology occasionally very rarely mean any harm, and are almost always not 'bigoted!'
And some people are instantly accused of being thick and racist if they voted for Brexit, even though some of the most industrious and intelligent people I know voted for Brexit. I have known some far left people completely ghost someone they previously got on with well, when they discovered they voted Conservative. Not even a discussion with them or anything, they were just dead to them.
I know one woman at work who refused to engage with or acknowledge someone she knew, and called them a bigoted cunt (lovely!) because they said they couldn't tell the difference between someone from Malaysia and someone from Indonesia, as they looked similar to her. That was not racist or bigoted, she was stating a fact. She could not tell the difference. She was labelled a massive racist.
I am white, and blonde, and blue eyed, and British, and have been mistaken a number of times (when in Spain, Italy, and Greece,) for a Swede or a Norwegian. Was I offended? Not even slightly. Then again, the Indonesian woman was not offended either; it was the white, 30 year old British woman who was offended on her behalf...
So incredibly narrow-minded, intolerant, and bigoted, and yes, I agree with you @Bonsaibreaker many of these 'social justice warriors' are not remotely 'accepting' at all. These type of far left judgemental people display the kind of abhorrent and intolerant behaviour that they accuse others of. Yet they can't see it.
I am also very pleased to see such a high vote for YANBU. Showing that the tide is turning on mumsnet!