There are extremists on both sides, I'm not one of them. If you can pass a background check that verifies you don't have a criminal mental health history, and you've been through some training in the safe use of your weapons, I can't imagine any law I'd support that would take away your guns.
I know of a cop who was very well trained in gun safety. He was a decorated cop (received recognition and awards.) He no doubt passed at least one "background" check and who knows what other kinds of psychological exams. . .
We was married to an extremely good looking, smart, LOVED police officer, friend of my whole family.
They divorced.
She was scared of him.
She got a restraining order.
He broke into her house, shot her in the head and then offed himself.
I have no faith or security in your much blathered about "background" checks.