Are those who dislike the Madhhab of Sheikh Muhammad ibn Abd al-Wahhab and his followers considered a sect of the Khawarij, based on the interpretation of the Prophet's Hadith that the Najd mentioned in the Hadith is the Kingdom of Saudi Arabia?

The claim that Sheikh Muhammad ibn Abd al-Wahhab and the scholars of his movement are Kharijites is a false assertion. This is because they are among the most disciplined scholars in matters of takfir (declaring someone an apostate), and they do not declare anyone an apostate except those whose apostasy from the religion has been established by the Sacred Law, as many scholars have affirmed. As for the hadiths that condemn the East, their meaning is clear to the people of knowledge, and this has been explained. The summary is that the Sheikh and the scholars of his movement adhere to the Quran and the Sunnah, and their call had a significant impact in combating innovations (bid'ah) and polytheistic practices (shirk), and in bringing people back to the methodology of the Prophet, peace and blessings be upon him.