The once Newcastle striker was pleased for his compatriot once again on Sunday afternoon.
The Reds were lacklustre and didn't look motivated. Newcastle did, though, with Wijnaldum the key to their success in the final third.
And Kluivert congratulated both his former club and the Dutchman on social media, joking that Wijnaldum should be pleased with his one and a half goals against Liverpool.
Needless to say, the win is a huge one for the Magpies, who travel to White Hart Lane for their next Premier League clash before hosting Aston Villa during what should be another vital top-flight encounter.
Everything Newcastle have been criticised for this season - desire, work-rate and character - was on show against Liverpool and the St James' Park faithful will no doubt want Steve McClaren's side to demonstrate the same every week.
For Liverpool, it's back to the drawing board but Klopp's men will almost certainly bounce back.