This is the kind of open hatred that people who don’t follow these matters generally don’t even realize exists. If what some Muslim clerics routinely say were widely disseminated, it would change the entire political discourse.

Note also how Issam Amira lies. Britain caused slavery, he says. He apparently has forgotten or is banking on his audience not knowing, about slavery in Islam, and about the fact that an abolitionist movement arose in Britain, not in the Islamic world.