I wasn't sure at first back when this happened, but when I saw pictures of the guy it became pretty obvious.
Of the videos on that site, only in the one where he's mocking Ted Cruz does it look similar. The one where he's mocking the general doesn't look similar at all.
Even if he honestly did not mean to mock the reporter for his disability, it is obvious why people would get that impression. So his reaction to this should have been to apologize. He could have explained that he honestly did not mean to mock the reporter in that way but that he understands what he did was inappropriate, it's on him, and that he's sorry. That's how a normal, decent individual would have handled this. The fact that he can't do that, or be even the slightest bit conciliatory, does not make me want to give him the benefit of the doubt.
This.