We don't know that one way or another. We just know he has pissed off someone enough to firebomb his house. Unless he's pissing people off in private, the only people he seems to piss off are those that are involved in corruption. The vast majority of times a journalist is murdered or targeted, it is relation to their reporting. But sure, that is all speculation.
What isn't speculation is the wide array of shady actions taken before the firebombing. Also some of the stuff that happened during covid was just insane to see.