Has a Democrat lemming ever posted a well thought argument for why he was guilty?

Never (and never will)

It's like 'self-defence' is crime nowadays (and despite all those involved on either side, being white, the democrats still labeled Rittenhouse a 'white supremacist'?)

They wanted him to be guilty because he's a white male.

In their heads he CROSSED STATE LINES, rocked up to a peaceful BLM rally in full tactical gear and KKK hood and just indiscriminately started firing into a crowd of black people. In other words they're morons who know fuck all about the situation but still feel the need to share someone else's opinion they have assimilated as their own and can rightfully be ridiculed.

Has a Democrat lemming ever posted a well thought argument for why he was guilty?

Democrats don't have 'well thought' arguments for anything.

The main reason they claim he's guilty is because he was not on their side. If, for example, the now-dead child-molester, "JoJo" had grabbed someone's gun at the gas station and shot a few of those guys who were protecting it, the Left would have rabidly defended his act of "self defense" regardless of circumstances.

However, Kyle, in spite of acting to protect his own life, must be an evil villain in their eyes because he was there to clean up rioters' graffiti and support the defense of the community.

No they haven’t, all they have are lies and their smear campaign. If Kyle had been a BLM thug who shot two cops they would be hailing him as a hero.

The last guy Kyle shot already had a gun on him.

If he wanted to shoot Kyle or somebody else...why didn't he just use the gun that he ALREADY had?