I'm in NYC and it's not dissimilar here. Constant friction between the police and anybody who wants any reform, in any position of gov't (judicial, legislative or executive) and completely over-the-top rhetoric about how the city is in shambles or is being destroyed, in a way that is incredibly divorced from reality.

I think these kinds of posters are probably new to the city and young, but also probably don't engage with culture much, and seem to spend a lot of time on social media.