Fans booed Verstappen, horner at the F1 75 event and FIA actually released a statement calling it disappointing and disrespectful. People think this will even be raised at the next World Motor Sport Council gathering on Wednesday.

https://www.motorsport.com/f1/news/fia-blames-tribalist-fan-behaviour-for-verstappen-horner-boos/10697797/

some comments on reddit about this are hilarious, wondering why fia is even commenting on a FOM event 

https://www.reddit.com/r/formula1/comments/1ivpaos/fia_blames_tribalist_fan_behavior_for_verstappen/