Unions are for reducing the imbalance of power between a company and its workers. They can be used for whatever objectives the workers have. In this case, it seems the workers are not disgusting human beings who can disregard the morality of whatever they do so long as it's obeying orders, and so not being involved in war crimes is an objective of theirs.
But actually, protecting your soul is a kind of protection.
It's definitely a suitable trio to condemn, but something like "the three worst people in international politics" might be a more accurate description, they're the three most obvious points where evil/amorality and power come together with international implications. (What e.g. North Korea does to its own population is utterly horrific, but they aren't bombing any other countries at least.)
They're actually quite different, Putin is the epitome of amoral self-interest, prosecuting a huge war which is crippling his own country just becuase he thinks having to say "ooops, I made a mistake" would weaken his grip on power domestically. Netenyahu is driven half by vicious racism and half by needing constant war to keep his coalition together and avoid potential legal problems for himself. And Trump is this half-crazy narcissistic collection of all of his country's worst impulses, doing things like this simply to validate the way he feels.
Israel and the US, the fascist aggressors who started this war, should obviously surrender, and hand over the architects of the war to Iran to face trial.
Though there are other places, like Lebanon, Palestine, Venezuela which will also have the right to put some of the same people on trial..Those rogue states really do attack a lot of other countries.
You need tender loving care once a week - so that I can slap you into shape. - Ellyn Mustard