The very top of the British political establishment has sought to link the murder of Jo Cox MP with the Brexit campaign. Arguing, against logic, and potentially in contempt of court, that the “politics of hate” and a UKIP poster were somehow responsible. So by their logic, surely David Cameron, Jeremy Corbyn, and their parliamentary colleagues will now take responsibility for the alleged attempted murder of Donald Trump by a British man. If you want to talk “tone” – as my colleague James Delingpole has pointed out – then the fingers of blame must be pointed at MPs from across...