That's too low a bar. It hasn't happened yet, but he has already done enormous damage on multiple fronts, some irreversible like the disruption of global economy, trauma of ICE terror victims and the enormous loss of human lives everywhere. You're saying that all those aren't serious enough for you. But for the rest of the world including the entire Americas (NA and SA besides the US), the Caribbean, the middle east, Africa and even the EU, consider the US as a serious threat now.