Your use of the word "innocent" there is doing a lot of heavy lifting. He did not have a day in court, and what he did was indirect. However, a lot of people consider the supposedly "innocent" guy that got killed a mass murderer.

Whether or not you agree with that assessment, it seems like you don't understand a few links in the chain there or are otherwise playing dumb. It is very reasonable for people to not care about the death of someone who is widely considered a mass murderer whether or not our legal systems have caught up to this sentiment.

In a perfect world that CEO would have spent his entire life rotting in jail, his ill gotten fortunes completely stripped and his name as infamous as other mass murderers. We live in an imperfect world where people like him get defended by weirdos online though.

It's not good that he got assassinated. Assassinations like this are a symptom of a failing justice system doesn't deal with human waste like Brian Thompson on it's own. If society widely considers someone like him a mass murderer he should be behind bars. But there's a pretty huge inequality between the ruling class and the poors these days, so the justice system has stopped working for the everyman. It's a natural result of cascading inequality, it will keep happening at an increasing rate if our civilization doesn't start holding people accountable for their crimes.