It has nothing to do with the "political climate". It has everything to do with the fact most people don't want to listen nut-jobs all day. In fact, in a free market it would appear people seem to prefer platforms that banish the nut jobs.
if you don't want to listen to "nut jobs", you don't have to, nobody's shoving Alex Jones in your face, but banning people you find objectionable sets up a dangerous precedent
Maybe Mr. Jones can build his own content distribution channels? If he can't, maybe his ideas just aren't that popular and his business should fail?
And for what it's worth, Alex Jones supporters spread like a cancer through sites that allow it. The community surrounding him and those like him are often more toxic then the founders.