Verbose
Deity
I'd say the Jihadists don't need more convincing. They've already decided, no matter what.I would say that people like this Tancredo are a much larger source of power for the jihadists than Medina or Mekka, because it reassures them that we really are the enemy.
What Tancredo might do, is help the Jihadists convince your average Muslims Joe in the street that the West really intends to do them harm.