Ultimately it was the fault of the gullible, scientifically ignorant,and lacking critical reasoning skills American public.
Take the "mushroom cloud" claim:
It takes a lot of electrical power to run those enriching centrifuges. The U.S. built the Ohio Valley Electric Company with two full scale power plants to supply the Portsmouth, Ohio enrichment plant as its only customer. Iraq couldn't keep the lights on but Americans stupidly believed the lies.
The other claims were also easily debunked but the people are taught to "believe" rather than know. It is so much easier to pick your tribe (party) and believe what they tell you.
It will happen again and although I will feel sorry for my children and grandchildren the country as a whole is terminally stupid and deserves what it gets if it continues to elect dimwits to public office.