Mostly the MAGA crowd wants BLM to suffer at any cost and enjoys when anyone left of them is upset.
I don't know what you're basing the assertion that the deceased had reason to suspect Rittenhouse was going to shoot him. If memory serves from photos and testimony of the incident, Rittenhouse was getting chased down by a guy with a skateboard who swung on him, he fell down and then shot the guy. If you think someone with a gun is going to shoot you, why would running at them help?
If you agree that he should have been acquitted and you're sad that MAGA celebrates him we're on the same page about everything except your feeling that MAGA values and American values are 1:1. That and you seem to think that anyone who harbors ill will in their heart towards their attackers forfeits the right to self defense, which I disagree with.