I think your distinction is a valid one, Israel has some war crimes going on whereas russian invasion of Ukraine was a war crime festival but you are fighting an uphill battle because trying to make distinctions in levels of evil is generally frowned upon because to many people it looks like justification. The reason is because most people can't imagine any other value to making distinctions in evil. I personally can but each time you are going to do it, you should be prepared to defend why, in fact, making those distinctions is useful while being clear that the purpose is not justification of evil acts. It's a thin line to walk on.