Of course, there were pagan Mongols, referred to as Tartar in order to distinguish them form the Muslim Mughals. In any case, this argument has no bearing on South Asia, where the Mughals are Muslims only. Mughalstan directly appeals to these persons far more powerfully than Urdustan, especially the Bangladeshi Muslims. These are Islamists who wish to subjugate all of South Asia by force and Islamise the populations inhabiting these regions. Islamic supremacists are very rare in the late 21st century, and there is no visible trend or base of support which would allow them to carry such a political program into effect.
Islamic supremacists are generally an embarassment to Islamic nationalists.
Most Mughalstanists are far less anti-Brahmin than other movements. Dalit-Dravidian nationalists, for example, view Brahmins as a racial enemy who are to be ethnically cleansed. Because of this, many Mughalstanists have become anti-Brahmin. If the Dravidians also desire a Hindu Rashtra, then they are free to do so, however, most Mughals would not consider this very likely - Dravidian nationalist based states are more likely in the South. Most Mughal Caliphs did not interfere in affairs south of the Vindhyas, and that would be the policy of Mughalstan.