Trudeau joined dozens of demonstrators outside the Canadian parliament who rallied in support of the Black Lives Matter movement in the US and over the death of Floyd, an African-American during his arrest by a white police officer. He did not speak at the event, but clapped and nodded along with other speakers and chants.
His kneeling has been hailed by his supporters as he might be the first world leader to have done so, but was met with considerable criticism as well.