Anger Over Iranian Elections Erupts In Toronto

This is not just in protesting Toronto but in many places around the world,i wonder if these protesters outside Iran in other countries know that the government doesn't really care or cant really do any thing about Iran's vote,and i know that the people in other countries don't really care for the most part about the Iranian election. i understand the violence in Iran but violence in other part of the world because of the outcome,really doesn't make any sense causing violence on foreign soil.