My history education was mostly one-sided like this in primary school, but not in secondary & post-secondary school. Perhaps the difference is that I wasn't studying in the US, but I don't remember any grave epistemological chaos.
History is full of things that can't be proven. We'll never be able to know for sure if the (battleship) Maine was destroyed by Spanish sabotage or if it was simply a tragic accident. Or take for example, the question "Did Germany start WWI". It sounds like a yes or no question, but the reality is far more complicated. Failure to understand this complication causes real problems (in this case WWII).
edit: removed American sabotage theory regarding the Maine, as it is rather unlikely.
History is full of things that can't be proven. We'll never be able to know for sure if the (battleship) Maine was destroyed by Spanish sabotage or if it was simply a tragic accident. Or take for example, the question "Did Germany start WWI". It sounds like a yes or no question, but the reality is far more complicated. Failure to understand this complication causes real problems (in this case WWII).
edit: removed American sabotage theory regarding the Maine, as it is rather unlikely.