Also, many Republicans aren't big fans of this new administration.
Also there is an irony in the switch between all the talk on the right about armed resistance to the BLM and Hillary and now the left talking about armed resistance to Trump.
I haven't heard of anyone on the left seriously discussing armed resistance to Trump. If they are, they sound rather delusional, just because of numbers. There simply aren't many politically active people on the left in this country who are also armed, or even believe in being armed. This sounds like a tiny number of radicals at best. This isn't like Central American nations in the past, or other parts of the world, where the leftists were actually violent and believed in using violent means to achieve social change. Gun control has been one of the big tenets of the "left" here for a very long time.
Note that I'm not supporting the right-wingers here (personally I was a fan of Bernie for the most part), I'm just pointing out the reality in this country. It's the right-wingers who make up the vast bulk of the gun-lovers and owners.
Additionally, going with the idea that you're right for the moment, you think gun owners are happy about hunting land being taken away?
Yes. They vote this way, and they've always voted this way. They continually vote for people who push the whole "privatization!!!" religion. So they're getting what they voted for.