By STEPHEN CASTLE and LIZZIE DEARDEN Britain’s home secretary invoked rarely used powers to ban a pro-Palestinian march that was seen by police and other critics as a demonstration supportive of Iran. But organizers vowed to go ahead with a protest. The right of pro-Palestinian groups to protest in London and other British cities has been a sensitive issue since the outbreak of the war in the Gaza Strip, with Jewish groups accusing some demonstrators of stoking antisemitism. But the annual…
