The whole stadium was booing him not only while being subbed, but during the entire 2nd half, he seemed kinda mad at the jeering and so it kinda looked like a response gesture. But then again you can never be sure and he'll def deny it, if asked.
If you are talking about C. Ronaldo then you should write it the right way, no? There's only one real Ronaldo, the one you are talking about isn't him. So would you mind to use the fucking letter C before writing his surname? Thank you.
“... It was a natural movement which all men make especially when you are running. You do it a lot on the pitch. The truth is that if anyone was offended by it I apologise, but it is like I have said. I made a natural movement which was not aimed at anyone in particular. On the TV you can see that it is a fraction of a second. It is nothing. I did not spend a long time deliberately doing it. It was something natural. ...”.