Pollitt wrote in the Wigan Observer: "Hopefully Callum will be able to move on from this and get on with the rest of his career.
"He's obviously very disappointed and very upset by what's happened, and it's not nice to have seen the reaction in some quarters.
"But he's from a tough Liverpool background, and I think most of it has been water off a duck's back.
"I've told him to stay off Twitter, but he's not the kind of lad who will walk away from a challenge or a problem.
"He's more the kind who'll say: If they want to abuse me, let them - but I'm not walking away.
"I've heard of some of the things people have been saying about him, and if they were to say it to his face in the street I think they'd have a little bit of a surprise. He can certainly look after himself that lad, so I'm not worried about him at all."