Salah, who announced his decision to leave Anfield in March, told reporters in December that his relationship with head coach Slot had broken down.
The winger, winner of a record four Premier League Golden Boot awards, scored 29 times in the 2024-25 Premier League as the Reds won the title in Slot’s first season in charge.
But he has been unable to match the heights of last term, finding the net just 12 times in 40 games in a season that sees the defending champions languishing in fifth in the Premier League.
“I think Salah’s trying to vindicate himself and make himself feel better because he’s had a very poor season,” said Rooney.
“So I think he’s been very selfish in what he’s done in the two occasions. It’s a shame and fans will be on his side, but I think when you look deeper into it and having been in a dressing room in a similar situation to that as well, Mo Salah knows exactly what he’s doing.
“That’s your manager. You can’t publicly disrespect him twice the way he has and get away with it. And that’s where if I was Arne Slot, I’d have to pull rank and just say, listen, you’re not coming anywhere near the place on Saturday, whether you like it or not. I really doubt he will do it, but I think he should.
“Of course he deserves a good send off but does he deserve it just for this? It’s the second time he’s done it. it’s just a shame to see one of the great icon of Premier League players leave the Premier League probably in this situation.”