If you live in a country – and chances are that you do – your head of state no doubt recently paid a cringe-worthy tribute to King Abdullah of Saudi Arabia, aka the psychopath’s psychopath, who died in January.

From 1,000 lashes for running a secular blog to executions for witchcraft, the country is a veritable buffet of barbarity. And wherever there’s cruelty in the Middle East, you can safely bet that my country, Britain, helped fund it: Saudi Arabia is, almost inevitably, Britain’s biggest market for arms, buying $2.4 billion worth in 2013 alone.