And so quietly, almost off-handedly, the Rubicon has been crossed. The United States of America, whose blood and treasure have been spilled fighting terrorism, is jumping into bed with radical Islamists.

By approving a role for the Muslim Brotherhood in a new Egyptian government, the White House is taking its engagement policy to a dangerous level. American taxpayer dollars will now help sustain the oldest Islamist group, one that helped launch Osama bin Laden on his murderous quest.

Perhaps this day was inevitable for an administration that refuses to say "Islamic terrorists," and claims "jihad" can be a good thing and Hezbollah has "moderate" elements.

But it is hardly inevitable that the Kumbaya approach will bring peace to the Middle East. More likely, it will be seen as Western weakness and beget even more violence against America and our allies.

The decision applies to Egypt, but it won't stay in Egypt. Nearly every Arab government is fighting radical groups that aim to eliminate our presence, Israel and Western-friendly leaders. Imagine what those leaders think about our willingness to endorse the Muslim Brotherhood, which helped spawn Hamas and similar groups.

Yes, I know, the Muslim Brotherhood insists it is no longer a radical group and doesn't advocate violence. But what they say is not always what they do. Days after a leader of the group said Egyptians "should be prepared for war against Israel" and urged the country to stop sending natural gas to Israel, attackers blew up a gas pipeline to Jordan. The one to Israel immediately was shut down.