Right church wrong pew.
These people aren't marching to demoralize our troops. They march to give hope to the terrorist organizations around the world and especially those in Iraq at this time. They can point to these demonstrations and say, "See, we just have to hang in there. The weak, morally bankrupt, fat Americans have no stomach for a long war. They will turn against their President and force him to quit. Even now, they fight amongst themselves to deny funding to their troops and the reconstruction of Iraq. Patience my brothers."
This successful strategy was used to great success 30 years ago in SE Asia. A Democrat controlled congress turned their backs, refusing to honor American commitments to a government that was newly formed.
The Anti-War Against Terrorism demonstration is for foreign not domestic consumption. It gives hope to our mortal enemies. That is why you have to be in the streets against A.N.S.W.E.R. and NION where-ever and whenever they appear.