Bale made his first appearance for Real since October 5—during which time he'd played on four occasions for Wales across two international breaks—when he came off the bench to whistles at the Santiago Bernabeu.
Per Goal's Guy Atkinson, Courtois said:
"You love your country and that comes before where you are playing, but he is involved every day and is a professional.
"He was very involved when he came on and generated a lot of danger. [Luka] Modric's goal came from a cross of his. If he wasn't committed, he wouldn't play like that.
"We are here to win games. What has happened, has happened. He gives everything in training and matches to help us win. The Bernabeu has its opinion and I am not in a position to comment on that."
A hostile reception for Bale was to be expected on Saturday after he and his Wales team-mates celebrated their UEFA Euro 2020 qualification with a fan-made flag that mocked his treatment by the Spanish media:
Manager Zinedine Zidane had urged supporters not to boo the winger, but sections of the crowd were vocal in their disapproval for him when he entered the pitch in the 67th minute.
The coach spoke after the game and called for fans to get behind the team:
Spanish football commentator Eduardo Alvarez condemned those in the crowd who continued to boo him throughout his time on the pitch:
However, as Courtois observed, Bale performed well despite the reception he received. He played an important role in Modric's goal to wrap things up, as it was his cross that Karim Benzema headed down to the Croatian.
The Spanish Football Podcast praised Bale's performance off the bench:
Bale has returned two goals and as many assists in eight Los Blancos appearances this season.
Overall, he has 104 goals and 67 assists in 239 matches for the club, which has helped them win four UEFA Champions League titles, La Liga and the Copa del Rey since leaving Tottenham Hotspur in 2013.
Bale still hasn't won over some of the fans after all he's done, but the cameo was a reminder of the kind of impact he can make—he could still play a significant role in any success Real enjoy this season.