Something similar happened in the Haskell community, where some people called for Anduril job postings to be removed.
Nix is a software project, not a social movement. The goals of Nix are entirely separate from how the software is used.
I really like Coinbase's statement that is is mission focused (https://www.coinbase.com/en-ca/blog/coinbase-is-a-mission-fo...). Anything that isn't directly related to its mission is out-of-scope. I wish the same was true about software projects like Nix.
If you care about the way your software is used, then by all means, say it in the license! Of course, such software won't get used much.
This stemmed from whether they can publically attach their name to NixCon, which is fundamentally a social event.
Likewise, support or protest against various sides in an international conflict does/should not affect the code/software, but is a product of the people involved and their personal convictions.
HN runs on open source software, but the HN community is strongly opposed to certain things, as is their right.