Carver has faced fierce criticism since taking charge as caretaker manager at St James’ Park, with Newcastle falling into the thick of a relegation battle under his stewardship.
The Magpies have looked disorganised and have failed to win any of their last 10 fixtures, but Allardyce doesn't believe Carver is to blame.
Instead, the Hammers boss says that Newcastle's players have let the club down and insists that they are the ones that the supporters should be pointing the finger at.
"I’m not sure they’ve played that poorly," Allardyce said. "The ultimate situation is, is that you can play as well as you like, but if you don’t wins you get put under severe pressure. Wins can boost confidence but a couple of defeats can destroy it.
“As a manager, that is the tough side of the game, trying to restore the confidence. That has been a hugely difficult task for John. He’s a great guy, he is Newcastle through-and-through, he loves the club from top to bottom. But the players haven’t done what they should have done for him and themselves.
"That happens, surprises happen at this level, that's why it's the best league in the world. Apart from the top boys, we can all be vulnerable to relegation at some stage.”
Despite Allardyce's kind words for Carver, he will still have no intention of doing him any favours on Sunday when he takes his West Ham side to Tyneside.
Newcastle need to win the fixture to ensure that they stay in the Premier League, but Allardyce will be determined to make their job as hard as possible.
The experienced boss could be taking charge for the last time at West Ham, with his contract expiring at the end of the season, and he will be determined to sign off with a win.