You say he is embraced by "left-leaning folks" as if he isn't embraced by conservatives as well. Ben Shapiro tried to play the same card you are and his fanbase ate him alive saying "stop trying to make this left vs right. It's a bi-partisan issue." When Ben Shapiro's fans are able to see the light for a brief moment, I think it's fair to say this specific issue reaches across the aisle.
All members of the political spectrum have or have known people that have had serious issues with insurance and saw the resulting fallout, such as denied coverage or bankruptcy due to insurance not covering something etc.
There’s enough of that happen that it is in the majority of people’s living memories across age spectrums too.
A true issue that unites all political leanings it seems
I've lurked in /r/conservative out of curiosity expressly with respect to this topic. Between that and the other conservative commentary I've read on the matter, conservative folks have mostly dumped on Mangione and called his actions terrorism. Even you state that he isn't enduringly popular with Ben Shapiro fans. I'm no expert here, but I'm pretty sure I'm right about conservatives not liking Mangione.
Moreover, I do think I know what moderates and Joe Biden-style neoliberals think, as that's mostly my circle of friends. They don't look favorably on Mangione's actions, either.
