Surely, Germany would have made clear the particulars of the ban to Abu-Sitta.
On what do you base this wonderful faith in governments to clearly explain their bureaucracies?
If this is the case, is this just a consciousness raising stunt on by Abu-Sitta?
So what if it was? This is framed like the story is about whether governments explain themselves well and if he knew about his EU-wide ban this story would be unfounded and manipulative, but whether Germany explained its actions well enough is not the issue, it's that a country banned someone for speech and then extended that ban to most of a continent.