BERLIN – People have taken to the streets of Berlin, London, Paris and other cities around the world to demonstrate in support of Black Lives Matter protesters in the United States and to vent anger over President Donald Trump’s response to the police killing of George Floyd in Minnesota.But at the top, the leaders of traditional allies of the United States have taken pains to avoid criticizing Trump directly, walking a fine line to reconcile international diplomacy with domestic outrage.Canadian Prime Minister Justin Trudeau let silence speak for itself when asked to comment on the decision to forcibly clear peaceful protesters outside the White House to make way for a Trump photo-op at a nearby church, standing pensively at his lectern.