Well, I'm betting he wouldn't like it. ;-) His predecessors didn't like it when the Afghan Mujahedin fought them with American-made weapons.

Look, everybody sells weapons to whom they choose...and who they choose just depends which way the wind is blowing at the time. It isn't determined by who is "good" or "bad". The USA helps arm the Israelis and the Saudis, for example. Other people help arm the Iranians or the Syrians or Hezbollah. What exactly is the difference, morally speaking? All those weapons usually do in the end is end up killing a bunch of mostly innocent civilians who happen to get in the way. It's a crime all the way around as far as I can see.