Where to start… Let’s start with the summary.
Summary
Dumbfuckery is as dumbfuckery does.
The Players, Dumb Fucks, in this case
Rittenhouse
Bad decisions often happen from those without experience in the real world, and Rittenhouse made some bad decisions. The biggest bad decision was being at the riot.
Of course, that same bad decision was made by each of the people that were shot during the riot.
From a legal perspective, Rittenhouse was on private property and protecting that private property. How and why really don’t matter. However you view the decision making by everyone involved, Rittenhouse had a right to be there, and he had a right to defend himself from others, in this case, three violent convicted felons.
Police
From all accounts, Rittenhouse has interactions with multiple LEOs during the evening. Of those officers, a total of NONE questioned whether Rittenhouse, reported as being about 5’3” and about 135 lbs, is old enough to be open carrying a firearm. What is wrong with them? If at least one of them had said, “Hey, how old are you? Do you have some identification?” then the shooting would never have happened.
Rioters and Media
Multiple idiots were in attendance here. We have the main players:
Unknown Rioter #1 – He fired his gun in the air while chasing Rittenhouse. Basically, he threw gas on the fire. Rittenhouse was in full retreat and trying to get away from the crowd that was chasing him. There was absolutely no reason to fire a gun in the air and provoke other reactions.
Rosenbaum – He chased Rittenhouse. Even though Rittenhouse was clearly trying to leave the scene
and get away from Rosenbaum, Rosenbaum continued chase. He tried to grab and take the AR-15 from Rittenhouse. I will assume that Rosenbaum had nothing but ill will in mind based upon his history as a convicted felon and sex offender and also based on his actions of throwing an object at Rittenhouse. Rosenbaum was shot and died. Lesson? Don’t chase somebody with an AR-15 that is clearly trying to retreat. Don’t chase them if you are not armed, at all.
Unknown Rioter #2 – He tried to kick Rittenhouse in the head, but missed. Rittenhouse shot at him, but missed, and unknown rioter #2 ran away.
Huber – After Rittenhouse fell down while trying to run away from the crowd, and another unknown 
rioter tried to kick Rittenhouse in the head, Huber hit Rittenhouse in the head with a skateboard and tried to take the AR-15 away from Rittenhouse. For all of the people out there that think a skateboard swung by an adult male is not a deadly weapon, I ask you to let us know so we can take a swing at you and see how quickly you go down. Of course, it is a deadly weapon when it was swung like it was. Of course Huber, not exactly a stellar citizen with multiple convictions including assault and domestic violence, is not exactly a brilliant person. Attacking somebody that has an AR-15, and that has demonstrated that they know how to use it, is just not an intelligent move. Huber was killed.
Grosskreutz – He rushes at Rittenhouse with a drawn handgun. Let’s not gloss over that this is another convicted felon and that he was carrying a firearm, illegally, Grosskreutz approached Rittenhouse with his hands up (with a gun in one) then lunged at Rittenhouse. Grosskreutz was shot in the arm, which took a very large piece of his bicep off. Intent to cause harm was clear. If Grosskrueutz had just kept his hands up and backed away, he probably would not have been shot, but instead, he became aggressive.
Media – While not all of the media, the vast majority reported about what great people Rosenbaum and Huber were, and the Grosskreutz is also a wonderful person that was there as a volunteer paramedic. It took a good while before any of the media dared to tell the truth about these three individuals. Big kudos to Richard McGinnis, though, as he did a very good job of reporting the incident as an eye witness.