I am not sure if libraries have Mein Kampf here - I think it is on the banned list.
It is crazy how they go back and rewrite history, rather than using it as a learning experience. I don't know if you have ever read Mary Poppins as a series, but that book surprised me at times with some of the slurs - though at the time, they weren't so.
The people who are censoring books are no better than the ones who say the holocaust didn't happen in my opinion. The subject might be different, but the ignorance is the same.
Evil Mustache Man is evil, but his ideas shouldn't be hidden away. This lets hate fester unseen, and his ideas go unchallenged by serious inquiry. It is important to understand the real and imagined grievances that propelled his career in politics. People like to compare every politician they oppose to Hitler, it seems. These comparisons usually have no substance, but the less people no about the original, the easier it is to apply lazy comparisons. My 2¢, anyway. Perspectives may differ closer to Germany where there were direct consequences in living memory.
Not having it in libraries doesn't stop people getting it - this is the age of the internet.
Unfortunately, the spread of US-based ignorance (sweeping statement) spreads. Like it or not, US politics and opinions dominate the global narrative in many ways, even if they are coming from people who are not well-read and have never been outside their own country - yet believe they know what the rest of the world is like.
Those lived consequences are important. Pain is a good teacher.