Hmm. Population of NI: 1.8m. Population of Baltimore: 600k (declining! as shown by a helpful google graph). So NI is three Baltimores.
Worst year of Troubles: 1972, 479 troubles-related deaths. I'm unclear as to whether that includes "background" non-political crime, so I'll round it up to 500 (current NI murder rate is about 1/100k pop).
Current Baltimore murder rate: 373 in 2017.
Murder rate for three Baltimores: 1119.
That makes today's Baltimore twice as lethal as Troubles NI, with all its carbombs and troops on the streets.
It's a mess that to me would seem to warrant national intervention. https://www.economist.com/news/united-states/21724399-americ...