Fascists on average aren't very clever. That's why they rely on the backing of military and police forces siding with them to take power. They suck at everything else and usually have to bruteforce their way into power. (Where they then proceed to suck ass at running the state and have to bruteforce their way to maintain power, until they get deposed somehow.)

Brazil has a past of far-right military coups & corrupt pro-fascist police facilitating a dictatorship takeover - the bolsanaristas thought they could create chaos that would give military an excuse to intervene and stage a coup.(Which is how CIA-backed antidemocratic coups usually have gone in Latin America.)

Basically they were/are delusional morons, and ironically it is *because* Brazil has a deadly serious past of far-right coups that the law there is not going to be kind to them.