Christmas Stamp

I was a bit irritated to find today that the USPS produces a stamp in their Holiday Celebrations Series that celebrates two Muslim holidays.
This address from Snopes.com has more information on the stamp.
Yes, I’m prejudiced. I understand that this could be considered an olive branch to Muslims, and I understand that we should willing to allow the celebration of every religion within our borders. But….why the heck are we honoring a religion that wants to wipe the United States off the face of the Earth?
It seems to me that we are hurting ourselves by trying to be politically correct.