Speaking as someone who's been into Nirvana and RatM since the early '90s, there's more anger and protest in 'We Live Here' than in the entirety of Nirvana's catalogue.
Sure, Nirvana were angry, but mostly in a depressed, teenage way, lashing out at an unfair world. They were angry on a personal level, mostly. Bob Vylan are angry on a social level, in the way RatM were. They're demanding the world look at the inequality they see, rallying us to take it on board and do something about it.
If that isn't protest, then I don't know what it is you're looking for.