When you point a gun at someone, they perceive it as a threat because pointing at gun at someone shows intent to kill.
Rittenhouse had intent to kill.
And… in fact, he did. He will win of course. But that’s another matter.
would you grab a bulletproof vest, buy a custom-fit strap so you can use your friend’s rifle, bring bullets from mommy’s house across state lines to scrub some graffiti in a photo op and go after some baddies at night?