The U.N. Security Council will meet Thursday at the request of six Western nations that sought an open session on Ukraine ahead of an expected vote on a Russian humanitarian resolution that they have sharply criticised for making no mention of Moscow’s war against its smaller neighbour. “Russia is committing war crimes and targeting civilians. Russia’s illegal war on Ukraine is a threat to us all,” tweeted the U.N. mission of the United Kingdom, one of the six countries that requested the meeting. The mission posted the flags of the six council nations requesting the meeting — the UK, U.S., F…