Why did the Mongols mortally feud with the Jurchens, while they easily came to terms with the Khitan?

The Khitan and Mongols are steppe people, they spoke close languages and were considered relatives. Chzhurchzheni – inhabitants of the forests of the Amur region, farmers. Having seized China, they also oppressed the steppe dwellers and Khitan as the indigenous Chinese (Han).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.