Why didn't the people help the Southern Song Dynasty to make two northern expeditions, but helped Jin attack the Southern Song Dynasty?

In the Southern Song Dynasty, in order to keep the throne, the rulers had to move south. On the one hand, the northern people were abandoned by the Southern Song government. Needless to say, after Xu Jin arrived in the north, he gave northerners a chance to obey his rule. It is not difficult to understand that "slave thought" prevailed in the north, so there is no need to be curious to help Xu attack the Southern Song Dynasty.

In fact, regime change is not necessarily a bad thing for the people, but at this time, it is hard to say whether Xu Jin's entry into the North is a bad thing for the people. After all, it seems that there is really no way to rely on the Southern Song Dynasty imperial court in the north, and people who have been ruled by Xu Jin for a long time may really forget that they are a Han Chinese.

In our opinion, "slave thought" seems to be the reason for us to criticize the Han people in the north, but what was wrong with it at that time? Besides, if the Southern Song Dynasty was indeed the emperor of the Han people, the Jin State was really not much different from the Southern Song Dynasty except for the Han people.

It doesn't really matter who will be the ruler for the boss's surname. People will be very grateful if they can live a down-to-earth life and stop living in dire straits. Otherwise, the "Heaven-Earth Society" which advocates anti-Qing and regaining sight will not end in failure. It was the failure of the rulers that the court of the Southern Song Dynasty was partial to a corner. Giving up a large area of land in the north means that the government of the Southern Song Dynasty is going to the end.

In addition, when the Southern Song Dynasty government made another northern expedition, new changes had taken place in northern Renye Fang. Perhaps they have forgotten the pain of being invaded at the beginning, or remembered that they are living well now, so it is normal for them to finally resist the government of the Southern Song Dynasty.