In an ideal world Pretti would have been allowed to have his gun and not be killed because of it.
We do not live in an ideal world. Pretti's own political team has made it clear for decades at this point they think guns are bad, carrying guns is a sign of some sort of mental issue, and most importantly they passed laws and judgement that you shouldn't be armed at a protest at all or else you are in the wrong (which was what they said about Rittenhouse, and what Minnesota tried to prosecute a couple for when they brandished weapons inside their own proprety while a protest was going on because Minnesota said it was "asking for violence")
Pretti's shooting was bad, but the moron and his retarded illegal loving friends are to blame for it far more than ICE is. Playing "I am not touching you! I am not touching you! I am not touching you!" with glowniggers is a recipe for disaster, either actually man up and start a fight properly or don't fucking engage.