These are conservative idiots. They consider every Muslim (including kids apparently) to be "Islamic Supremacists".
I am not familiar with the second gentleman, but Siraj Wahhaj is well known and respected. He has fostered interfaith dialogs with Jewish and protestant leaders and done a lot of good. Of course, for these protesters, it doesn't matter what you do; there is no such thing as a good Muslim.
Do you notice they are shouting "Go Home" to people who are born and bred Americans. It as if they think that you can't be American and Muslim.