There is video evidence and many eyewitnesses that he did no such thing. If you need to lie to justify fascism, maybe you shouldn't be supporting fascism.

He possessed a weapon on his person in a state where that in completely legal, in a country whose constitution explicitly says he's allowed to own that weapon. There was not a single reason for him to be executed by federal agents.

He possessed his firearm while obstructing federal agents, while wrestling with federal agents on the ground.

He can legally attend a protest with his firearm, but once he engages in other crimes he is also carrying his firearm illegally.

He was not executed.