I'm not very specific about the form of any election related violence. IMO it probably won't start as shootings.

I would expect, for example, that in some places, voters who appear to only speak Spanish and have the obvious mestizo skin color, will be stopped and confronted by right wingers who don't accept non citizens voting. These face to face confrontations will lead to assaults.

And enough assaults happen and word gets out, then things can escalate.

I don't agree that those attacking initially have to feel that they have nothing to lose. They may have such a feeling that the system is rigged against them that they take it out on individuals who are close by symbols.