Just to nip briefly back to this, let's not underplay what Linehan tweeted. In essence he said that anyone who comes across a trans women in a women's toilets, should attack them (punch them in the balls), just for being a trans woman - no other justification being required.
That statement would appear to be incitement to violence, a criminal offence.
Whether you like it or not, whether you agree with him or not, is academic. The police have a duty to enforce the law, so arresting him is not in itself a stupid act.
Whether it required five officers is a different matter, but the arrest was wholly legitimate.
The fact he's now claiming it was a joke, after a long history of strident anti-trans hatred and activism, looks a bit pathetic to me. At least the people getting arrested for peacefully holding up placards aren't pretending that they are just doing it as a joke.
Anyway, back to the main story of the day. Trump being outed as a nonce. Let's not forget to keep hanging that around the necks of his fanboys, it's just too much fun to miss.