The U.S. has accused Syria of using Weapons of Mass Destruction.
Which they undoubedly have done. Unfortunately genocide is not a new crime in the annals of human history.
And the U.S. seems to have conveniently forgotten that less than 50 yeaqrs ago they used Napalm and Agent Orange on the populace of Viet Nam.
Ten years ago Iraq was accused of having WMD and used as a basis for starting the war there and the world knows how that turned out.
As Martha Gillham has pointed out he real culprits are the politicians and religious leaders of the world.