Unpopular Opinion

This is referring to all the people who say I own this gun to protect against a tyrannical government. While I agree fighting a tyrannical government is noble Most of those people aren't serious about it and are just LARPing. If you are serious about fighting for your freedom then you'd know that fighting alone will get you nowhere. No revolution or civil war has ever been won by scattered armed individuals with no organization, you need to join a group to be effective.

But all the militias are full of right wing psychos

Yeah, but you won't be able to change their mind from the outside. Join one and try to educate them on true freedom from the billionaire capitalist class. Worst case scenario even if they don't respond you'll still be training and learning how to work in a group, and you can be a spy and learn their tactics and how to defeat them in the case of a civil war.

I'll just buy the gun now and join a group once shit starts going down

That's the wrong order, get organized and then buy weapons. Left wing organizations will be banned and forced underground long before guns are. There's a very high probability trump will ban armed left wing groups in the next couple years, him restricting gun purchases is far less likely. It's best to get in an organization and build trust before it goes underground because after they are banned they are rightfully more picky on who they let in for fear of informants.