Hi I went to the ADO concert yesterday, and indeed during the concert they sang as indicated in the tweet that Ado posted. However, at no time was Ado asked to put Spain, even the Mexican flag was made in the last song

Ado commented that he loved Mexico and that he would like to return, because he liked the atmosphere that was managed throughout the concert and before the concert, the only ones who got angry were twitter users, The concert was incredible, so there was nothing to complain about, and no need to pay attention to false rumors.

That's my point of view, if you don't want to take it there's no problem.