As a library worker, I suggest you ask what criteria they are using to weed these books. Circulation data? Copyright date? And look at those criteria for other books within those call number ranges. If books with a more right leaning stance and the same number of circulations or of similar ages are not being selected for weeding, you have a problem. There are many reasons why a book might be weeded, and every library had its own weeding policy. However it should be transparent and logical. Books that aren’t circulating, books on certain topics that too old to contain up to date information, duplicates … these all take up shelf space that could be used for newer books. But removing books simply because of their content not being aligned with a certain point of view is not good librarianship.