In the 19th century, through contact with Western academics and missionaries, Zoroastrianism experienced a massive theological change that still affects it today. The Rev. John Wilson led various missionary campaigns in India against the Parsi community, disparaging the Parsis for their "dualism" and "polytheism" and as having unnecessary rituals while declaring the Avesta to not be "divinely inspired". This caused mass dismay in the relatively uneducated Parsi community, which blamed its priests and led to some conversions towards Christianity. The arrival of the German orientalist and philologist Martin Haug led to a rallied defense of the faith through Haug's reinterpretation of the Avesta through Christianized and European orientalist lens. Haug postulated that Zoroastrianism was solely monotheistic with all other divinities reduced to the status of angels while Ahura Mazda became both omnipotent and the source of evil as well as good. Haug's thinking was subsequently disseminated as a Parsi interpretation, thus corroborating Haug's theory, and the idea became so popular that it is now almost universally accepted as doctrine though being reevaluated in modern Zoroastrianism and academia.