That said: I was shocked to walk by an anti-NATO "hands off Ukraine" protest shortly after the 2022 invasion. I delved into it a bit and there seemed to me to be at least two kinds of people who would have such a point of view.
* People with an extremely deontological morality: if they saw a runaway trolley, then they would never pull the lever. Some of these folks seem to have their beliefs so tied up in anti-Americanism, pacificism, and/or isolationism that they refuse to accept exceptional situations.
* Fanatical socialists who think that global unity among socialists is more important than national interests or human life - they usually point out how the First World War caused the demise of the Second International[0]. This reminds me of a reprehensible argument apocryphally attributed to Lenin: socialists shouldn't try to make peoples' quality-of-life better under capitalism (indeed they should try to make life worse) because doing so would slow the coming of the Revolution.
[0] https://en.wikipedia.org/wiki/Second_International#First_wor...