Believe me I understand where you are coming from. I was against guns for a long time. How one decided who is a criminal is do a background check. If they have a felony, they can't purchase a firearm. If a law-abiding citizen pulls a gun on you, they are no longer law-abiding. In that situation, you can tell they are a criminal because they pulled a gun on you.
The 3 murderers did commit a criminal act and they got convicted. That is a situation where a law-abiding citizen turned criminal. Rittenhouse got his weapon from a straw buyer, an illegal act on both the buyer and the seller. Neither situation was right.
I wonder if we ban the sale of guns. Is that what you would prefer? A total ban? Would you also disarm people who currently have guns? What would be your solution for the guns already in circulation? What happens in some European countries is that only criminals and cops have guns. A citizen is either out of luck or needs to wait for the police after the crime is committed.
I believe I have the right to stop someone from harming me or my family. LIFE, liberty, and the pursuit of happiness.
I would prefer a gun-free society but there is too much out there already.