All it will take is for someone to make the right emotional or financial appeal, and I worry Trump will reverse course

To be fair, its equally likely for him to reverse reverse course after a few bombs for the same reason.

He is quite unstable, and prone to grandiose gestures to force people to the negotiating table. Helpful at some times, but might come to bite us all in the ass when he looses a bomb that people won't be a bluff he is trying to call.