No it's not!
In fact, it is against America's national interest to fund the Fatah PLO Palestinian Authority.
From A7 News:
"Obama Bypasses Congress, Frees Aid to Palestinian Authority"
["President Barack Obama has bypassed a Congress block and signed a waiver declaring that aid to the Palestinian Authority is “important to the security interests of the United States,” AFP reported on Friday."]
--read it all here.
See also Pamela Geller's blog on this over at Atlas Shrugs.