The mental health issue is a way to get to them. The background and mental health check is seen as acceptable to most people. Then they will just change what is considered too mentally unfit for a gun. An East German immigrant explained that in communist East Germany they label people that just believe in God as mentally unfit.
MAKE NO MISTAKE, THEY INTEND TO TAKE THE GUNS AND THEN ENSLAVE US.
It is only a question about the method they use to do it.
And lets not forget all the vets with PTSD will now be unable to get guns even for a temporary condition as they transition from killing machine to civil society.
It is all about the guns. Imprisoning people for mental illness is just a bonus.