I think Trump is dangerous on a global level--his saber rattling ("we are sending an armada") at North Korea is a dangerous game that could end in a world-ending type scenario. I think it is unlikely, but when the stakes are so high any increase in risk needs to be justified. Pence at least knows a bit of history and international conventions so is a bit safer facing outwards. I would hate to see his theocratic ideology given power in the US, though.