So you are for letting ALL felons own guns if they want to, regardless of their crime? Murderers, rapists, wife beaters, child molesters, etc.?
Whatever anyone feels about that, the fact is that any felon who isn't in prison and wants a gun can get one, in spite of background checks. Because they don't mind breaking the law to achieve their goals, and it's only the law that stands between them and getting their hands on a gun.
I'm not going to say that background checks never stop bad people from getting guns--I think they probably do, once in awhile. But if you look at prosecutions from denied background checks (remember, anyone who gets a valid denial is probably committing a felony by trying to buy a gun) you can see that even the government doesn't believe that the denials are worth following up on. In 2017, for example, there were 12 people prosecuted for attempting to buy a gun when they were prohibited by law from trying to do so.
I tend to agree with the idea that a person who's so dangerous that they aren't allowed to own a firearm should not be loose in the population. I understand that we have to deal with reality though, and society isn't going to allow us to lock up all the people who really need to be locked up. But when we accept reality, we have to accept all of it, not just the part we like. The evidence suggests that background checks do very little to keep guns out of the hands of criminals.
That said, I'm ok with background checks as long as they are done so they don't compromise privacy, so that they don't delay/deny people who are allowed to buy guns, and as long as the information gathered doesn't turn into a registry.
By the way, this disagreement is a perfect example of how even the gun community doesn't agree on everything that might relate to voting.