OK, so if Russia "grows some balls" and reinvades Latvia to assist ethnic Russians, you're OK with it? After all, if Latvia fails to "grow some balls" and fight off an invasion by a much larger and much more heavily armed neighbor, that's just their tough luck, isn't it?
If Russia thinks it belongs to them they should try to take it. If they want to act like victors in a war over conquered neighbors, then they should defeat them first.