There seems to be some kind of difference in the meaning of “political”.

I offer the definition from the Oxford Dictionary:

adjective

relating to the government or public affairs of a country.

The idea that everyone deserves healthcare is itself political, it pertains to how a country should be run. It is also not a universal view; many people disagree that people do in fact deserve healthcare.

Luigi Mangione’s act was indeed very political. It is an eruption of the view that all people in the USA deserve healthcare and that the private system is depriving people of this right.

I agree with you. Perhaps more insistent messaging would be useful. A pin, maybe?