Does division mean "disunion" here?

Yes, the mealy-mouthed hypocrit is using division in the sense of "disunion."

Thanks Setanta.

Another question:

Whom does the "they" refer to?

Context?

"It is true that the war on terrorism and the war in Iraq have converged as the external and internal forces seek to drive us out, and they can't be permitted to do that," Mr. Berger said. "But it's increasingly clear that how we conducted the war in Iraq ?- hurried, alone and not prepared for the day after ?- made the terrorism problem more difficult."

"They" refer to the external and internal forces. In this example, the internal forces would be those in Iraq who don't want the Americans in their country. The external forces would be those countries and groups who did not want the US to go to war in Iraq.

Thanks Phoenix.

Does it mean "they can't be permitted by (the US) to do that"?