The burden of proof is on the person making the assertion, not the guy listening. The fact that terrorists were tossed into jail and were still terrorists when they got out proves nothing at all.
This is a very similar argument to a common one here in the USA where a statistic is produced showing that 18-25 year old black men are jailed at astronomically higher rates than 18-25 white males and thus/therefore the USA justice system is racist. That’s an assertion without proof. No effort has been made to show that any significant number of those men in jail are innocent. Same flaw here. Islamic radicals have been beheading their “infidel” victims since Europeans were little more than barbarian tribes. ISIS is nothing new.
What’s changed is that the occupying US forces and US - erected Iraqi leadership wasn’t willing to be as brutal as Hussein was in keeping a lid on the minority population of homicidal Islamists and other various “troublemakers.” Hussein didn’t use to merely jail them, he used to butcher them in job lots. (And don’t take that as my endorsement, just my observation)
YOU made quite an assertion (“The West made ISIS”). So far your evidence is paltry.