I hear ya. Just today got into a discussion about this very thing and am out of ways to explain it to people that have no interest in facts or the rule of law.
So sick of the "Founders didn't envision assault rifles", "Don't need 30 rounds to hunt", "You can't stand up to tanks and airstrikes with any rifle", "The founders are just like politicians today so who cares about their views on anything", "Times have changed and the constitution is outdated".
It's like that Piers Morgan video with Larry Pratt. They really are that full of hatred and condescension. They are incapable of having a respectful debate or engaging in critical thought. Tired.
Had this same conversation today. When I began with my response about the 2dA and the framers intent, I was told that if I wanted to defend myself, I could use however many muskets I wanted. Then I was dismissed and the others kept on about banning all guns "for the children". These people are truly psychotic.