Things are not so easy. A lot of "watermelons" (green outside, red inside) were planted into our military during the last 30 years of social-democrats/marxist-leninist in disguise governments. I honestly don't know what they'll do, or if they'll have the courage to do it, considering how high may be the price.
Lula's cultists are few, but they have the narco militias from the whole continent to back them up, specially Colombia's FARCs, plus US black ops and whoever europe, specially France, send here through the border we share with them at the Guiana.
Unlike US folks, we don't have any guns.
If corrupt SC judge Alexandre de Moraes comes on TV to admit fraud, it'll extinguish the fire for most protestors, but chances he won't do it and we'll have to deal with generalized riots.

It would seem that there are no more fair elections on planet earth.