Hadhrat Maulana Qari Muhammad Tayyab (ra) writes:

The base and foundation of all Aqaai’d (beliefs) is Tawheed (belief in the oneness of Allah), which was the religion of all the Prophets (peace be upon them all.)

The base and foundation of all actions is Ittiba’ Sunnah (following the Sunnah – the perfect example of the Prophet sallalhu ‘alayhi wasallam.) All remaining actions which are transmitted via a reliable chain of narrators, whether it be from the former or latter generations, are either from the fundamentals of Sunan-e-Nabawi (the practical examples of the Prophet sallahu ‘alayhi wasallam) or from it’s effects and resultants.

Hence, the actual and stressed upon aspect of this Maslak (of the ‘Ulama of Deoband) is Tawheed, which would exclude all types of polytheism and [ascribing] partnership to Allah Most High.

Maslak ‘Ulama-e-Deoband Page 16-17