People and new knowledge
People in general do not like new knowledge that requires them to look at reality in a completely different way. Because they have come to like the way they have become used to. Hence they will protect their current view by accusing those with new insight with false accusations eg you are stupid , you are arrogant and think you know everything etc. But don't worry. This is the normal procedure. With time they may realise they were wrong and slowly change. Change is difficult for humans.