The meaning of grab and let and the reality described is trivial. I think grab had a less sudden and unexpected meaning than you gave it in Trump's meaning. CIA, Obama, Nuland Biden and co grabbed Ukraine. But Russia didn't want to be grabbed by the Crimea. Not did they agree to easterners being grabbed by the Donbas. They hit back.

Some males are violently aggressive when they do their grabbing and whack their intended victim if she resists. Some women carry a pistol in their bag and have killed their assailants. Good for them. Russia is carrying atomic bombs to resist the assault.