Earlier quoted context omitted.
To add, the primary reason the US supported Iraq was because it didn't want Iran to send oil to the USSR. This was because the US didn't want a communist nation to have a good economy. That's the story of a bunch of the CIAs operations.
Iran itself in its current form is a continuous line of failures of CIA and MI6 that led to their revolution against highly unpopular shah that was undemocratically installed only by those powers. Why do you think back then the us embassy situation evolved as it did. 'Embassy' my ass, full of cia folks regardless what shallow hollywood flicks try to propagate, meddling with internal affairs for profit and power of br…
We've simply had decades of propaganda teaching us that the US is the most moral nation that has only fought moral wars for moral reasons.
A lot of the history books are about American exceptionalism and triumph. Even when they cover topics like slavery and civil rights, they paint it as being temporary embarrassments that we got over and now everything is OK.
MAGA is just a bunch of people who swallowed that propaganda whole and never questioned it in the slightest. We can see that in the fact that they get really upset about history lessons that are even slightly critical or analytical of America's past.