To support your comments, I remember from the trial that the FBI had interviewed several people that had spotted McVeigh downtown minutes before the explosion. Yet they were not called to testify. Seems one job of the prosecution would be to place the accused at the scene. It seems the reason they were not called, was because they placed a third man (the swarthy-looking man) with the two men.
Al-Husseini didn’t just appear in Oklahoma City; he was later discovered working at the airport in Boston making up box lunches for the vendor who provided those (supposedly including box cutters) to jet liner hi-jacked by Mohammed Atta. Yes - he made up box lunches on 9/11/2001.
I don’t see that as coincidental, not at all.