So the reason Putin went into Ukraine was just to acquire more terra firma? Pretty shallow of him. I would have thought it was more substantial than that.
You wouldn't do things like bomb civilian infrastructure or flaten entire towns like Mariupol, if you're invading to protect Russian speaking people. It just completely destroys any credibility that claim might have had.
Ukraine has natural resources valued at #4 in the world. The oil and gas reserves found long after Ukraine won their independence is the reason Putin is invading. Those reserves represent competition to Putin's own reserves. But with them he holds even more monopoly power over Europe.
And that's why the West would be absolutely crazy to let Putin take Ukraine.