Thousands of fans rushed on to the field, and Maccabi was handed the cup by default when officials were unable to clear the field so play could continue and the referee suspended the match.
"Those people are abnormal and idiots," said Beitar owner Arcady Gaydamak, an Israeli-Russian billionaire and candidate for mayor of Jerusalem later this year.
Beitar fans are infamous for their excesses and far-right views. Six months ago, Beitar fans were banned from two home matches after they booed through a minute's silence in memory of assassinated prime minister Yitzhak Rabin.
Some fans even sang songs praising Rabin's 1995 murder by Yigal Amir, a Jewish extremist.