What does it take to make a true scotsman?
If a guy writes antifa messages and the lyrics to the most widely known antifa anthem, and his friends and family talk about how he became a militant leftist in recent years, and he shoots charlie kirk- what more did he need to do to make his motive obvious to you?
We had a manifest left behind by antifa gunmen before and the media tried to downplay or deny the motive.
If actually engraving his motive on the murder weapon isn't enough for you, what more is needed? Signed autotape confession with three witnesses, public notary, a police officer and his grandmother watching saying 'thats my tyler'?
No group wants to own the shooter. He does not represent the conservative right despite his family, I'm sure you agree on this.
The left also does not want to own him. You can point to vile online posts but if you actually look at Democrats in government or progressive influencers, the vast majority is condemning him. They are hating on the right like always, which is different than saying Kirk deserved to die
The point is that both sides are highly motivated to disown him.
You are listing data points that are collected by the right, but you omit the data points collected by the left and say the case is shut, no need to look further. In reality, the guy's politics are clearly complicated and irrational