I have never said only people in the right are violent, do not shove words into my mouth. I said Brazil doesn't have waves of left-wing violence like it does right-wing violence, that is all. I live here, I follow current events, I think I know more about this than someone abroad who just Googles about it sometimes. Even if Lula said something about left-wing extremists, he was building a broad anti-Bolsonaro alliance, so of course he'd try to appeal to the center. Do me a favor, and look up when exactly acts of left-wing violence have been carried out in Brazil, because I cannot think of a single one that's taken place in the last 10 years.

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Edit: In response to your edit, comparing throwing glass bottles to right-wing violence is borderline laughable, I'm sorry. There have been people stabbed and shot to death, one in his own birthday party. And while I will not pretend the inverse cannot happen, and to my knowledge, at least one bad political discussion ended the other way around, apparently in self-defense, Bolsonaro supporters have deliberately placed nails in federal highways seeking to damage as many vehicles as possible and tried to kill policemen sent to disperse illegal blockings of highways, not to mention one of Bolsonaro's allies trying to kill federal police officers and the fact hundreds of his supporters have been begging for a coup for months. These are not comparable situations.