> After that, they can renew their attack on Ukraine and widen it to the rest of Europe
There's literally no evidence that's the case, this is fear-mongering on a scale I've never seen before. To the contrary, the reaction of the world to this conflict has already made enough of an impression on any would-be invader that it's a really bad idea to enter a conflict where the West is on the opposing side, and I am very convinced that Putin won't try his hand again. Of course, I cannot prove that to you, but you can't prove anything either, you're using the same "emotional" argument you've accused me of using. Your argument goes down to "we must continue killing people in a war to prove a point". I find that argument abhorrent.
> How many people more will have to die? 10 million?
If you stop the war right now, zero. You're claiming a hypothetical future made up in your head where Russia will still continue attacking others. At least try to consider that that may not happen? Consider that Russia knows very well it will suffer for decades from mistrust by the West, by sanctions and by losing a huge market. It knows all that, why would it want to make things even worse? This argument by some of the Western media just doesn't make sense, try to think about it rationally!
> Insisting on peace at any cost is purely emotional feel-good response
This is always the same argument used most war-mongering people in history, it's the cause of the death of millions because every war in history started because of someone holding that view. We need to go back to a civilized dialog between nations. You can claim that Putin is the one who broke the peace, and I agree with that, but just trying to continue a big war to make him pay for that mistake seems pitty. In my opinion, fighting any war for any reason is not what a civilized mind would do. There are cases it's unavoidable, but this is NOT one of those. It's avoidable, Putin is open to dialog, don't believe the narrative you've been told. There is room for dialog, the war was almost ended with the peace talks in Belarus... have you forgotten that? Do you know why that didn't stop the war?? Read about it, it was NOT because of Russia.