Googled because I can't do anything else due to wet carpet.
Imam Feisal
Yes. Totally radical.
Only sites I can find with arguments objecting are places like WND and they say things like "No decent American, Muslim or otherwise, would do such a thing."
I can't find anything he's said that's shocking or offensive. At most he's coming from a different perspective, for example stating that Muslim youth are growing up in dictatorships that Western countries helped create and admitting that part of America's responsibility is necessary to make progress. Spin as much as they like, that doesn't mean he's saying it's all America's fault.
In short, meh. Unimpressed.
Also, Dome of the Rock was a mosque before it was a church before it was a mosque.
The Hagia Sofia was a church then a mosque then a museum. Neither of these comparisons fits.