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.
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?
Every time you hand something to aggressors you need to hand them more the next time.
How many km between russia and the border of the country where you live?
For me it's 0.
You either help Ukraine now or be ready to fight yourself sometime in the future.
It's like in the winter you are cold and you pee in your pants. It will be warm for a moment end then what?