"These young men often become radicalized not because they are Muslims, then, but in reaction to the racism of which they, their friends and their families are victims. "

And the radical ISIS attacks 2 days ago in Tehran, Iran? And Egypt? And Tunisia? And Libya? And Morocco? And Somalia? And Yemen? And Kenya? And Chad? And Syria? And Iraq? And Turkey? And Indonesia? And Mumbai? And Pakistan? And Afghanistan? And Philippines? And Germany? And Berlin? All those attackers in those countries were from members of the majority population and religion. There was no racism from British or French citizens in those attacks.
Radicalized? It's not a virus that infects these people. These people rationally and deliberately carry out these intricately planned attacks knowing full well their actions and consequences. Nice try to obfuscate and distract from the real reason: their belief system. There is something terribly wrong with their belief system.