All hyperbole aside the U.S. probably helped Iraq build their chemical weapon factories and taught them how to manufacture and use them.

Actually, Europe is far more guilty than this than so of the United States. So if anything, there are more blame for Europe than the United States. Pretty ignorant of you to ignore other countries' contribution that gave rise to Saddam Hussein's WMD program.

As part of Project 922, German firms such as Karl Kobe helped build Iraqi chemical weapons facilities such as laboratories, bunkers, an administrative building, and first production buildings in the early 1980s under the cover of a pesticide plant. Other German firms sent 1,027 tons of precursors of mustard gas, sarin, tabun, and tear gasses in all. This work allowed Iraq to produce 150 tons of mustard agent and 60 tons of Tabun in 1983 and 1984 respectively, continuing throughout the decade. Five other German firms supplied equipment to manufacture botulin toxin and mycotoxin for germ warfare. In 1988, German engineers presented centrifuge data that helped Iraq expand its nuclear weapons program. Laboratory equipment and other information was provided, involving many German engineers. All told, 52% of Iraq's international chemical weapon equipment was of German origin. The State Establishment for Pesticide Production (SEPP) ordered culture media and incubators from Germany's Water Engineering Trading.

In the late 1980s, the British government secretly gave the arms company Matrix Churchill permission to supply parts for Saddam Hussein's weapons program, while British Industry supplied Gerald Bull as he developed the Iraqi supergun. In March 1990, a case of nuclear triggers bound for Iraq, were seized at Heathrow Airport. The Scott Report uncovered much of the secrecy that had surrounded the Arms-to-Iraq affair when it became known. The British government also financed a chlorine factory that was intended to be used for manufacturing mustard gas.

Here it the product that we actually sold to Iraq

The United States exported support for Iraq during the Iran–Iraq war over $500 million worth of dual use exports to Iraq that were approved by the Commerce department. Among them were advanced computers, some of which were used in Iraq's nuclear program.

These were not actual chemical weapons. In fact, that was legal under international law to do so.

More information to come.

France also provided glass-lined reactors, tanks, vessels, and columns used for the production of chemical weapons. Around 21% of Iraq’s international chemical weapon equipment was French. 75,000 shells and rockets designed for chemical weapon use also came from Italy. About 100 tons of mustard gas also came from Brazil. Austria also provided heat exchangers, tanks, condensers, and columns for the Iraqi chemical weapons infrastructure, 16% of the international sales. Singapore gave 4,515 tons of precursors for VX, sarin, tabun, and mustard gasses to Iraq. The Dutch gave 4,261 tons of precursors for sarin, tabun, mustard, and tear gasses to Iraq. Egypt gave 2,400 tons of tabun and sarin precursors to Iraq and 28,500 tons of weapons designed for carrying chemical munitions. India gave 2,343 tons of precursors to VX, tabun, Sarin, and mustard gasses. Luxembourg gave Iraq 650 tons of mustard gas precursors. Spain gave Iraq 57,500 munitions designed for carrying chemical weapons. In addition, they provided reactors, condensers, columns and tanks for Iraq’s chemical warfare program, 4.4% of the international sales. China provided 45,000 munitions designed for chemical warfare.