Two goals by Steve Morison were cancelled out by another double strike by Glenn Murray, denying the home side the opportunity to enter the automatic promotion places.
"Palace are a good team, I hope they go up," Warnock said.
"They're used to winning here but they didn't deserve to win.
"(Luke) Varney didn't have to dive, but in the first half he got fouled - but no free-kick. I don't condone that (diving) though."
He reserved special praise for his goalscorer, adding: "I think Morison has been good since he's been here, it's what he puts into the team. He's a team player."
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- Steve Morison