I heard Kim Eo-jun saying something about "knowing the subject"

‌He was acting like a condescending old-timer, telling a former party leader and member of the National Assembly to "know the subject"
I know Kim Eo-jun is the kingmaker and a cult leader who dominates the minds of people in their 40s and 50s
but does he have much influence over people in their 20s and 30s as well?
Since he is naturally eloquent, I imagine he has many young fans,
but I'm not sure because today's generation might be different.