I don't get your question "who can stop them?" The Ukrainians have already done so, to a large degree. Nobody imagined Ukraine lasting more than a week of invasion, but they did so, and then retook large swathes of territory and forced the Russians into a defensive posture.

The mistake the west made was not having confidence in the Ukrainians early on, and not supplying them with the tools early on and into last winter. We let Russia pull back and build intensive defensive lines that would be impossible to breach without air support.

As for nuclear weapons... they are not tools to win wars.

The first country to use a nuclear weapon as an offensive weapon will be turned to glass. It's just not a tool that even Putin is stupid enough to use.

They don't make you a powerful offensive power, just a powerful defensive one. And nobody has ever suggested invading Russia, despite their paranoid claims to the contrary.

If the Ukranians already done so, why is there still war?

So your strategy is to not have kids and hope you die before the baddies come to rape you?

What are you talking about?

Well you seem to scared of nuclear blackmail to the point of giving up.

Not only that, you publicly advocate for not helping Ukraine and condemning tens of millions of people to horrors is russian oppression.

So you are doing kremlins work exactly as they wish for.

You seem to understand that should we not help Ukraine then they will not stop. They still have nukes to keep scaring you.

What is your strategy?

As I stated in my other comment, I don't think Russia would use nukes, only when their core existence is threatened. I'm not advocating to NOT to help Ukraine, I'm just trying to figure out what exactly is our plan. Which is still unclear. You and all others here have absolutely zero idea. I'm a very cautious person and before committing to sending more weapons, at least I'd like to know what is our strategy. How we're going to win? But of course, it's also an option to send as many weapons as we can without any further strategy and let as many Ukrainians die as can, without even understanding what winning means. This is somehow the only accepted solution currently. And if you don't like that, then you are pro Russian fallen for Russian propaganda.

It’s not hard to understand when a person is either fallen for russian propaganda or is an active troll.