Because it’s pathetic that people will jump up and down on one vile issue, yet let the other slide under the table.
One spouts racism and one spouts homophobia. Double standards from the social justice standpoint. If people are so wound about Robinson then the same should apply for what’s happening in Birmingham.
But they’re being allowed to carry on their protests without any interference from anyone who wants to make “changes” in society.
I think I've mentioned it elsewhere, but there is opposition to that plan from highly conservative folk from a bunch of religions, whether Christian, Jewish or Muslim, and as @Walken says above, I suspect the vast majority on here think those people are wrong. I had a conversation with one of the Jewish groups opposing the teaching in schools, and they tried to explain that they weren't against same-sex relations, but didn't want their children exposed to things they didn't agree with. Suffice to say, it's not something I agree with, but as an atheist there's a lot about religion I don't agree with, but going against religious views becomes a prickly issue.
Either way, they're just regular Joes like you and I, whereas Tommy Robinson or Ann Widdicombe are striving to enter politics, or have a media platform where a lot of people follow what they say. That's a whole different kettle of fish to a few people outside a school gate as they have much more of a chance of making their views policy.