Because they see what the insurance exec was doing through his job as itself being violence, as it resulted in many deaths.

They view Luigi's alleged actions as self-defense/ defense of others, i.e. morally justified.

I wouldn't personally morally disagree with someone Luigi'ing Maduro or the other guy mentioned according to that same standard, but in this situation and the knock-on hypotheticals of government intervention, this is not an individual using personal force according to their beliefs, these are governments (which have no moral rights, just the assertion/ imposition of authority by violence) expropriating them for political purposes. So not defense of others.