A prominent scholar of the Ahl as Sunnah, Mawlana Sayyid Ahmed Saeed Kazmi (Anwar ul-Uloom, Multan) writes:

“On the issue of Takfeer [ruling someone as an apostate], our stance has always been that, whosoever utters words of Kufr we shall not refrain from pronouncing Takfeer against them; whether they be Deobandi or Barelwi, follower of the League or the Congress, Nechari [naturalists] or Nadwi. On this issue we shall not differentiate whether someone is a friend or a foe.

This certainly does not mean that if one follower of the League utters a word of Kufr, all the followers of the League are Kafir; or if one Nadwi committed Kufr that all Nadwis are apostates. We do not declare all the residents of Deoband as Kafirs due to passages of Kufr written by some Deobandis.

We and our elders have repeatedly said that we do not decree any resident of Deoband or Lucknow as a kafir just because they live there. According to us, only that person is a kafir who commits insults against Allah, His Prophets and the chosen people of Allah and despite repeated warnings, does not repent. We also consider those people to be kafir who are aware of such Kufr and are aware of the clear meanings of these insults, and despite this they consider the insults to be the truth, the insulter to be a believer and their leader.

And that is it.

Apart from this, we do not declare anyone who claims to be a Muslim as an apostate. The number of people we have ruled as apostates are very few in number and restricted [to a specific issue]. Apart from these specific individuals, no Muslim from Deoband or Bareilly is termed an apostate. Neither are [Muslim] followers of the League or or the Congress. We consider all Muslims to be exactly that – Muslims.”

Source: http://aqdas.co.uk