It’s official: criticising Black Lives Matter is now a sackable offence, even here in the British Isles, thousands of miles away from the social conflict currently embroiling the US. As protesters again fill the streets of a rainy London on Saturday, as part of a now internationalised backlash against the brutal police killing of George Floyd by Minneapolis police, those who criticise them do so at their peril – as two men have recently found out.