I've shot photojournalistic and sports assignments off and on over parts of three different decades. There is no "best" tool for everybody,and what works for one person might not work for another person. Oddly, I recently saw a whole slew of journalistic pictures made by a world-famous photojournalist, mostly with a Leica and wide-angle lens focal lengths, and I found virtually every image to be tedious and boring...the short focal length lens made the backgrounds just fall away, and the repeated use of the same short (21mm) focal length lens on dozens of shots made for the most boring pictures...despite the web site's owner gushing over this guy's work, I found the stuff to be uninspiring, cliched, and visually stultifying. I saw MANY, much better images by "unknown" Reuters and other wire service shooters who were using d-slrs, and who had some different focal lengths that they actually USED. Moral of the story? Do not use the same focal length over and over and over because it is "supposed to be" the one to use. In the case of these middle Eastern protest pictures, the photographer using the Leica and ultra-wide was becoming involved in the scene by being right up close to those involved; I could see it in their eyes, the people were almost mugging for the camera, and if not mugging, they were certainly "aware" that the photographer was there, and was a high-end type shooter. Even poor people recognize that a Leica, film or digital, is not a commoner's camera..and when some guy is pointing one at your face from six feet away, you're 'effing up the scene by being IN it, and not "reporting" on what is actually happening.
In light of the above...I actually like PJ work that shows what is really happening, with the photographer outside of the interpersonal or close-public space of the participants. Something along the lines of an 85, 100,or 135mm telephoto gives a nice look at things, and keeps you out of the scene. By the same token, at times, you simply MUST be closer to your subjects, or not be able to get the shots, and for that I like a 17-35mm f/2.8 wide-angle lens on FF. A 300mm f/4 is a handy lens for longer-range work and some events,mainly where a speaker is at a podium or actors are on-stage.