Justified? No. I agree there's a chance—a very very slim one—that they had information that would make me think their show of force was reasonable. But AFAIK, they didn't supply it. They didn't justify their actions to the general public or to any oversight agency, either ahead of time (understandable) or after the fact (less so), and nothing compels them to do so. They can execute the warrants as they see fit, using basically whatever ex-military hardware they like, without explaining themselves to anyone.
I further believe that this lack of justification is routine. Even if there was a good reason, that do this routinely without being either compelled or persuaded to supply it is by itself evidence our police are militarized.
American police collectively lost a lot of trust and authority. Obviously the most significant aspect is actually murdering people like George Floyd in plain sight while wearing a badge. But dangerous stunts like this are a contributor as well. Do they want to regain our trust?