Some pro-Palestinian demonstrations could be stopped, the prime minister has warned, as the UK’s most senior police officer said the threat to the Jewish ­community was greater than it had ever been. Keir Starmer indicated he wanted the language expressed on some protest marches to be subjected to “tougher action” as he sought to allay the fears of British Jews after a series of attacks on their communities in recent weeks. “When you see, when you hear some of those chants – ‘globalise the intifada’ the one that I would pick out – then clearly there should be tougher action in relation to that,” Starmer told BBC Radio 4’s Today programme. While he said he would not interfere in day-to-day policing, he said “there are instances” in which he would support stopping some protests altogether.…