Do you think a negotiation would guarantee peace? Russia has shown that any peace is temporary and they’ll continue whenever they like. Russia already invaded and seized Ukrainian territory once. The world didn’t take a harsh response, and here we are, with Russia invading and trying to seize Ukrainian territory once more.
What would be so different this time to stop Russia from going after Ukraine once more? At some point you have to dig in your heels. It’s a paradox of peace – you cannot have a peaceful society unless you are willing to fight to defend it.