Agreed, Luigi isn't a hero.
I think there is tremendous utility in looking at why people cheer a murderer and couldn't care less about Brian Thompson. I don't mean to speak for everyone here, but I think (and hope) we all agree Brian Thompson didn't deserve to die. Most of us probably come to the conclusion because we understand that murder is always wrong. I've talked to several people who do in fact think Luigi Mangione is a patriotic hero so I could get a better understanding from their secular perspective.
They view Brian Thompson as a pseudo serial killer by the fact he/UHC used an algorithm to automatically deny 33% of claims for people in need of life threatening medical care. It's not even an opinion that UHC has a higher denial rate than the other carriers (which are also disliked). If the reports on this are true, as there hasn't been anything to debunk the data thus far, then I could agree Brian Thompson was acting unethically and outside the law, I would think of him as a not-so-good guy. This doesn't change my position that murder is always wrong and that his life is not worthless and disposable in spite of him screwing tens of thousands of people out of medical care that were entitled to.
When we only look at the surface level of people "glorifying Luigi", it's easy to ignore one of the biggest issues we are facing in the US.... our broken health care system. I pray God can use this tragedy for good. Perhaps the good is people are made aware of the corruption in the private health care industry... That they are in bed with our politicians... That we can't trust greedy people to make health care decisions on our behalf. God has proven He can turn someone's bad into a good.