I lived in Minneapolis during the protests, and someone did light up a gas station just a block from my house, but I wasn't concerned - I'd already prepared to lose everything when I joined the protests. Fighting back against the government is going to take sacrifices, both from willing and unwilling participants; if we're too afraid of stepping on people's toes, then those in power will just use that angle to quash any up-and-coming resistances.
If protests are something people can just ignore until they're over, then that's what they'll do - they need to be polarizing in order to actually get people to make a change. The enemy of positive change isn't always negative change - it's often an apathetic population who would rather not put forth the effort to make any change at all. If people are pressured to take a side by a sufficiently disruptive protest, they'll usually join their fellow downtrodden, but you need to force them to make that decision.