So your first complaint is that the phrase "having been marred by gang violence in recent years" doesn't fully express that the violence included "multiple stabbings" and "homicides." Uh, that's what gang violence usually entails: stabbings, shootings, and murder.

You chalk that up to the writer intentionally ("conveniently") omitting that. Then you cite the NY Post, widely acknowledged as a sensational tabloid, presumably as an example of the coverage you prefer?

Then, you take fault with the author expressing their opinion that the festival had "an overwhelming show of force."

Is that all the author complained about in this respect? They didn't say "damn fascists!" or anything else? They didn't attach any value judgment -- YOU did. The author just pointed out that it was an "overwhelming show of force" which you admit did make the event safer.

If this is the awful, biased "liberal" media you're worried about, you should probably stick to the Post. That way all of your existing biases can be reinforced.