The fun part is that their use of the Chicago homicide rate is misleading nearly to the point of being "lying with statistics". Yes, there was a large spike in the homicide rate a few years back, but that rate has been steadily declining since then. And historically, even the recent peak was still well below what it was a couple decades ago.
The other reason that this comparison is so (intentionally?) misleading is that the bulk of violent crime in Chicago is gang-related, typically inter-gang warfare, and is concentrated in the poorest districts, which are also predominantly minority districts. Poverty in these areas of Chicago is some of the worst in the nation; and consequently gang membership and activity in those areas is among the highest in the nation. It's mainly gangs fighting over territory. That's an oversimplification, of course, as there are a number of other factors, but it's the biggest factor.
Yes, it's bad, but it's not nearly the problem that Trump and his fanboys want to pretend it is; and certainly not even remotely equivalent to the rise in ideology-driven white supremacist terrorism. Just another distraction tactic from a government and political community who are invested in denying the problem of white supremacism in this country, for reasons that are bloody obvious to anyone paying the slightest bit of attention.