I don't know who Ivan Horvath is, but he's no friend of Lee Harvey Oswald, nor is he a friend of John F. Kennedy.
And after reading what I wrote- that most Oswald-in-the-doorway deniers do their denying without providing an alternative to where he was- what does Ivan do? He denies Oswald-in-the-doorway without providing an alternative to where he was.
But then came along Jeff Smith, and Jeff took care of business. Two hits: Jeff hit Ivan, and Ivan hit the ground. Way to go, Jeff. I couldn't have done it better myself.