Seems really weird. Why would he do that? Because he hates Pep that much?
He is hot headed.
It is good in some aspects, bad in others.
In 2005 and 2006 when Ronnie and Etoo were our two best players and both were in top 5 in the world, there were a lot of articles in El Mundo Deportivo and Sport where Etoo was mad at Ronaldinho and he was giving comments like:
"If my name was Etoo-inho (in the sense: if he came from Brazil and not from a poor African country), I would have won Ballon D Or."
So, instead of being happy for his teammate who has won it (Ronaldinho), he was being salty and jealous.
Even then, his ego was above teammates and a club.