Turns out he said "stupid" that's the report. I think a second yellow card (nearly the same result) would have been fine for that, but when you consider that a player who is already winning and it's 90+ additional time period, Fred knows he should not be still arguing with the ref. He was aware what he was doing, and he was aware that he was looking to get a second yellow card.
I think pastor did what he did for christmas, he was like that back at premier league and still same thing happened. I do not know how christmas is in turkey, but I assume he would leave for brazil and go back to his family, so it doesn't even matter. I know Turkey is a muslim nation but they do seem to have a lot of players and people who are christians as well, so maybe he will stay, I do not know to be fair.
If truly Fred said stupid then I think the ref was right in giving him the 2nd yellow, cause is very unprofessional to use a foul word on another player while on the pitch, Football is a mean of entertainment that can be used to promote peace and not for violence therefore as a professional player, one needs to be mindful of their actions and choices of words while on the pitch, he should've been aware of his 1st booking and try to avoid another one.
Now look what his careless act has caused his team, they'll be playing against one of the toughest team in the league and therefore they'll all the strength from all areas of the squad, the absence of Fred would be an advantage to their opponents, cause Fred is one of their key players this season, well I'm not quite sure if Fred purposely attracted the booking to himself to be available for Christmas, however he'll really be missed by the squad.