WASHINGTON – Former prime minister Tony Blair warned on Sunday that the roots of radical Islam were far deeper than we think and said Al-Qaeda would have killed 300,000 on September 11, 2001 if they could. "This is actually more like the phenomenon of revolutionary communism," Blair said in an interview with ABC News, commenting on the reach of Islamic extremism. "It's the religious or cultural equivalent of it, and its roots are deep, its tentacles are long, and its narrative about Islam stretches far further than we think into even parts of mainstream opinion who abhor the extremism, but...