Universal background checks have the same problem as virtually everything else the anti-gun crew propose -- they burden honest, law-abiding people while not doing anything to stop the problem. Just like "No Guns Allowed" signs -- if there had been a 30.06 sign posted at the entrances to that church, does
anyone think the shooter would have turned around and gone home?
Can't buy a gun because you can't pass a background check? No problem -- steal one. Or buy one from a guy who stole it and who doesn't bother to run background checks.
(30.06 sign:
https://www.texas3006.com/signs.php )