When Donald Trump showed up at the pope’s funeral in a blue suit, the fashion and protocol police of social media immediately proclaimed him guilty of disrespecting the pontiff. Within minutes, there were bitingly sarcastic memes — photos of Trump and Vlodomir Zelenskyy in which the Ukraine president asks, “Don’t you own a black suit?”

Donald Trump's outfit and behavior at Pope Francis' funeral caused massive controversy. Here's what happened and why it matters.