Disfellowshipping seems harsh. WT only wanted a library card
Let's not forget that WT is currently a member of the OSCE, the European counterpart of the UN. In fact, the OSCE's goals and objectives are so similar to the UN's they are considered one and the same. The OSCE is a self-described "politico-military" organization.
WT claims to hold NGO status in the OSCE (as it did with the UN) merely to advance "Kingdom interests", but, setting the political-military aspect aside, what WT participates in to accomplish their stated goal is nothing short of interfaith, yet another "sin" that WT categorically condemns.