Yes, if the Qing Dynasty hadn't forcibly changed hair accessories and clothes, the war would have ended 20 years earlier, and there wouldn't have been so many massacres.

However, a careful comparison is a serious sinicization of the Qing Dynasty. By the end of the Qing Dynasty, even Empress Dowager Cixi could only speak a few words of Manchu, and she usually spoke Chinese, which was almost the same as an old lady of Han nationality.