More a nibble than an invasion. By nibbling at the most pro-Russian pieces of Ukraine, it increases the liklihood the of the rest of Ukraine joining NATO and the EU. This will end up being good for Ukranian Jews (NATO/EU and more involvement with the west), but will hurt Russian Jews (Russia will be increasingly isolated). It will encourage the NATO countries and the US to stop the program of emasculating our armed forces, and while many Americans don’t want to be the world’s policeman, we more than almost other group have reason to want a strong friendly cop patrolling the beat.
As we have had good relations with both sides, it is best for Jewish groups to be neutral and support a peaceful solution. Putin isn’t necessarily our enemy, and many Ukranian nationalists are exactly our friends.