Similarly there was a common refrain that Obama created ISIS, which was equally impossible given that it happened before Obama. Does that absolve him of any blame for ISIS-related failures? Not at all, just the creation of it.
If I’m not mistaken, this reference was about the ISIL state created inside Syria. Obama waited til Damascus was obliterated before doing anything. American tax payers forked out billions of dollars to weaponize resistance fighters, those resistance fighters turned against us and took all those toys with them to Syria. That is why the claim that Obama created ISIS was used by Trump.
No. The reason why Trump claimed that Obama created ISIS is because Trump just makes up lots of random accusations, be they valid or not. You are retconning Trump’s intent by assigning reasoning that Trump was likely never even aware of at the time he said it.
Trump questioned the validity (and existence) of Obama’s birth certificate for ages. Trump had no interest in whether the claim was actually valid.