Why should the New Culture Movement point its finger at the Confucian traditional morality represented by Confucius when it opposes the old morality?

Confucian culture has always been the mainstream culture of feudal society. Although there are many schools with their own advantages and disadvantages, they are all based on Confucius' thoughts, and Confucius is its general representative. Opposing feudalism should at least have a specific target, so that Confucius and Confucian traditional thoughts can be targeted and recognized by a large number of people. At that time, the main leaders of the New Culture Movement learned a lot from Confucianism. Later, I was baptized by western thought and became "democratic". I fully understand that the preaching in Confucian traditional morality is not in line with modern thought, so criticizing Confucian culture can often hit the nail on the head. This is also the reason why there were so many masters who studied Chinese and Western at that time ~