He's an atheist but not politically correct, which is a requirement for rather illiberal liberals.
He's criticized feminists for being man-hating and hyperventilating over men looking at women on the street while ignoring Muslim rape pandemics in Europe and female genital mutilation and honor killings.
He's criticized the push to protect Islam from criticism under hate speech / Islamophobia rules, because we do not protect any other religion from criticism - and a religion that from its inception says you can kill atheists is a problem. ISIS executes atheists, Pakistan's police didn't investigate several 2015 atheist blogger murders, and Saudi Arabia sentenced an atheist to 2000 lashes recently. Dawkins has criticized the atheists for mocking Christianity but being afraid to even give moderate criticism to Islam, for fear of their lives, which is all the more reason to criticize it.
So he gets no-platformed.