对的,少了一个is或者was
这里是that引导的定语从句,里边是一个被动语态,需要一个be动词,构成被动语态.
当然,假如不用is的话,可以处理成过去分词短语做后置定语,把that也去掉.这样就变成He is a progressive worshiped by many young people.