Strategic and necessary aggression for Russia? Yes.
Justifiable? Not under current international law.
Being a Pariah and a rogue state is preferable for Russia to full encirclement by hostile states, and losing access to the warm water ports that are technically Ukrainian.
Preventing an explicitly anti-Russian alliance from setting up military emplacements on Russia's border is a GREAT reason to invade.
Strategic and necessary aggression for Russia? Yes.
Justifiable? Not under current international law.
Being a Pariah and a rogue state is preferable for Russia to full encirclement by hostile states, and losing access to the warm water ports that are technically Ukrainian.
Oh no! Better call up the international police! International law is a bad fucking joke