The guy they are pinning this on wasn't a leftist. He was among the 'dark-enlightenment' sphere of influence, which is right-coded/alt-right. Had left a review of Ted Kaczynski's 'Industrial Society and Its Future', had 'Mein Kampf' among his list of books he wanted to read, and followed/shared wojak and pepe memes on his twitter. Anyone who claims he was some left-wing antifa militant watches too much Ben Shapiro and needs to lay off the (((establishment))) pipe and spend some time among the people with boots on the ground, figuratively speaking.
That being said, Luigi Mangione clearly isn't the assassin. Nose bridge width, unibrow, skin tone, none of these match with the security camera footage photographs taken of the assassin at the time of the shooting. He is simply a patsy that serves several purposes.
First, to cover up the ineptitude of the NYPD and other arms of law enforcement,
second, to scare the normies back into subservience and keep them from rising up (as well as uniting against the chosen dividers),
third, to put pressure on lawmakers to restrict access to ghost gun parts and 3d printed firearms, and
fourth, to associate a certain sphere of influence with terrorism. There may be other motives and unseen agreements that are not as obvious as well to this whole event, including but not limited to UHC members testifying to congress pertaining to fraud and other activities.

IQ test time. Find the image that is not like the others.