Same civilization that gave chemical weapons to Saddam to use against Iranians I'm guessing...
Western nations did not directly give completed chemical weapons to Saddam Hussein; instead, Western companies and governments supplied the essential precursor chemicals, manufacturing equipment, and dual-use technology that allowed Iraq to build its own massive chemical arsenal.
During the Iran–Iraq War (1980–1988), Western nations actively ignored, facilitated, or financially guaranteed these transactions to ensure an Iraqi victory over Iran.