You said it is different than a government banning books but universities/colleges being publicly funded are effectively the government. I fail to see the difference. Libraries in general to the extent they are publicly funded should be neutral and not pick what materials they put in their collection based on political considerations, or subjective opinions of what material is too extreme.

Banning a book entails prohibiting private citizens / businesses from distributing it. Just because a government isn't funding the distribution of certain material doesn't mean it's banning that material.

Letting the library keep a single copy is hardly funding distribution. Historically books were expensive so unless you were wealthy the only place you would have access to books is the library. Saying you think it’s ok to ban a book from the library so long as it isn’t totally banned is basically arguing to keep ideas that are too dangerous away from the unwashed masses.

It’s not even banned from the library though - libraries provide internet access via which you can read the book if the author chose to make it available to the public in the internet.

Yesterday's extreme view is today's mainstream.

Historically universities have been the birthplace of various revolutionary movements. It is arguably one of their roles in society.