I really don't know what point you are trying to make. The man who shot up the church in Charleston, for example, was arrested and is currently in prison. None of the other things you listed were against the law. So, "enforcing current gun laws" wouldn't have prevented them.
One point I am trying to make is righties are fighting like everything to overturn laws that have already been set by SCOTUS.
Another point I am trying to make is that it is illegal to carry weapons into many government buildings. But, those who claim to be patriots (right wing code for racist) got away with it and none of them were shot and killed. A White man crossed state lines (illegal) with a gun that was not his (also illegal) and murdered two people in Wisconsin. And Republicans are defending him.
We need to enforce gun laws. Republican feelings be damned. Republicans had this mantra of "your feelings don't matter" and I think it is high time they had that thrown back at them.
Which laws are they trying to overturn?
The idiots carrying guns to protest outside the capital building in Michigan didn't violate the law. Just because something is illegal in, say, California doesn't mean that it is also illegal in Michigan.
With regard to Rittenhouse, there is no evidence that he crossed state lines with that gun. He appears to have been too young to have been carrying a firearm without parental supervision, and he is currently in jail and charged with several very serious crimes. I'm not sure how you can claim that the laws are not being enforced while also giving examples of people who are currently incarcerated because they broke those laws.
The laws trying to be overturned are Roe v. Wade
and marriage equality and ACA. Not to mention the landslide Biden win. If Heller v. DC
is the "law of the land" then that would mean that a victory in a "liberal" state like California or Utah is the "law of the land", no?
And, yes, pointing a gun at a federal officer is a federal crime. Look at George Floyd or Tamir Rice or Andy Lopez or Brionna Taylor. They were not federal officers, but guns were involved a a "justified" murder happened. The White racists who invaded a federal outpost in Oregon are celebrated for using guns and force and not a shot was fired.
Yes, Rittenhouse crossed lines with a gun his family in Illionois gave him. He crossed state lines to murder people. So few "liberals" care if he would have gone deer or elk hunting so that does not matter. He took a gun in Illinois, crossed state lines, killed people, and left. And Republicans are silent and even give money to defend him. They do not care. This should be echoed and shouted.
Again, and I can not stress this enough, I am one of those "liberals" who know and support gun rights for things like feeding a family or standing up to monarchies like MAGA. As long as a person is part of a "well regulated militia" great. But, if you need every type of gun because "them liburulz iz takin ourz gunz!!!!" then no. Prove it. Prove the jack boot thugs busting in doors to take all guns under Obama. Show it. Prove it. Give us links. Give us proof. Show us how "liberals" hate the Second Amendment. I'll wait..........