Yes, this is the exact intention of the second amendment. Armed resistance against tyrannical government. If the rise of fascism in America isn’t the time to use it, it’s meaningless.
The founding fathers envisioned state militias that would rival the power of the federal army and keep it in check. That ship has sailed, so it already lost a lot of its bite, but any power it still has can only be justified for that purpose
The current Republican Party is anti conservative in a lot of ways, but those terms have become roughly synonymous