To hold Putin, Lawrow and the whole dishonest bunch of the Kremlin to be believable in anything at all, constitutes the height of naivety and thus stupidity.
And believing that the Kremlin would be satisfied with consolidating the Donbass "Republics" into its Federation is equally so.
It wouldn't, for one thing, address Ukraine's continuing desire to enter NATO and EU. something written into the Ukrainian constitution since 2019, and, for another, not address Russian concerns over both encirclement by NATO and the irritant that a democratic and thus continually economically prospering state provides on its very doorstep.
That latter item being even more frustrating in that it is, according to not just Kremlin's stance, a nation of ethnic brotherhood.
As to sneering at calls for Ukraine to resist, especially when those calls come from within that nation, go tell it to the Poles, the Baltics, the Czechs, the Hungarians and everybody else that did just that in the past.
Letting any bully have his way on account of not having a chance against him would have the whole world run by bullies.