Both-sides-ism is not some kind of "free points" move in an argument. It's entirely consistent to believe (a) that a "tame" political statement supporting immigrants is acceptable in release notes, while also believing (b) that a cutesy poem defaming immigrants would be abhorrent and unacceptable. No one has an obligation to think that all political messages are acceptable just because they think that some political messages are sometimes acceptable.

Just to take an extreme example, imagine someone put in a note expressing empathy for the families of the victims of a natural disaster in their release notes. The following conversation takes place on Hacker News:

A: I don't really think these sorts of statements have a place in release notes. They don't ultimately accomplish anything or help anyone.

B: I think there's no problem with expressing compassion like this. It's not particularly obtrusive and isn't harming anyone.

You: How would you feel if the release notes had expressed glee at the disaster instead? You would oppose that, right? That means you must also oppose empathetic messages in release notes, to be consistent.

Or to sum up this whole thing in a dril Tweet: https://twitter.com/dril/status/473265809079693312