I don’t agree. I think Stalin’s army took the bulk of the fight, and saved us a lot of blood; but on the other hand, we had him on lend-lease (ie on our military material), so we could have easily took him out afterwards.
It was in our interest, but we failed to follow through on the reality of Russia at that point in time.
Stalin certainly took the wind out of Hitler’s sails and that certainly helped the fight on the Western front, but Stalin could never have pursued Hitler back to Germany or had enough money to but bullets, fuel, food and tanks to keep East Germany and Eastern Europe without Lend-Lease.
We never wise up - the axiom should be that we NEVER, NEVER, NEVER support dictators or fanatics of any type. That goes for Saudi Arabia, the Palestinians, China, and on and on and on.