The young asshole cross state lines with an illegal weapon to get in on the fun of shootin' liberals. There is no way to portray this any other way, but cold blooded murder.
His life is over.
Cold blooded? God you're a dingbat!
Crossing the state line with an illegal weapon is premeditation. Even if he didn't cross state lines with the weapon, it's illegal for him to open carrry in Wisconsin, without a permit, and since he was under 21, he could not obtain an open carry permit until he turned 21. So Rittenhouse was guilty of multiple crimes BEFORE he shot three people, killing two of them.
Just like many of the Capitol insurrectionists, Rittenhouse just want to kick some liberal ass, and get in on a free pass to raise hell. Guys like Rittenhouse are always looking for ways to "play cop" or to "go wild" with no consequences.
There is no legal reason for Kyle Rittenhouse to be in Kenosha at all. He was not part of the protests. Police had asked so called right wing "militias" to stay home and let them do their jobs, and Rittenhouse disobeyed those calls and went out with an illegal weapon.
In carrying an illegal weapon - a felony, committed two murders. Because he committed the two murders, with his illegal gun, the charges are automatically raised to 1st degree murder. Kyle is lucky that he was underage when he murdered those people. He'd be looking at the electric chair otherwise.