I agree. There will be hordes of them bowing toward Mecha inside the facility. If this is truly a museum to honor the victims, there is no need to display their pictures and quotes to keep history in perspective. Stating their objective plain and simple is enough to do so. We don't need to see their mugs and read their battle cries!Muslims will.
It will become a shrine for their martyrs. They might even want to use the sight to hold a memorial service for their heroes every 9-11.