If team has stated that behavior is unacceptable, why are they accepting it? Why aren't police removing these people from the stadium? I don't know if they can be arrested in Israel for being disruptive or disorderly in public but, at least, they'd be kicked out without a refund for their tickets.
Egypt postpones verdict in retrial of Al Jazeera journalists to Aug. 29 (Reuters)
from the article: Jerusalem’s racist soccer fans are few in number, but they rule the show