I wish some of my conservative friends could assuage the worst of my fears of a Trump presidency, but I fear that many Trump supporters want something that scares me to death.
Here's how it goes...Trump fulfills his promise of blocking Muslim immigrants to the USA. This inflames the Muslim world, both the masses of peaceful Muslims and the small pockets of terrorists. Sadly, but inevitably there will be some kind of successful terrorist attack in the USA or on our foreign military bases.
Potentially Trump reacts in similar fashion as the GW Bush administration did after 9-11, meaning he starts a war with a nation not at fault for the terrorist act, but instead of Iraq, this time we attack Iran. But the Iranian military is vastly more capable and powerful than was Iraq's. And I seriously doubt that China and Russia will sit this potential conflict out, as they did with the Iraq war.
Trump fulfills his promise to "Bomb the shit out of them" but the real terrorists are glad to die and mostly innocent people die at the hands of the USA, again.
A recipe for WWIII