I hope this thread is a joke.
I believe the mainstream Sunnism is Salafism, Ahle-E-Hadith, or the Deobandis.
Show me where it says in Qur'an and Sunnah to practice Sufism?
Sufism in the beginning form is the knowledge to understand our heart and the knowledge to clean it. It is in the essence of Islam faith which is "Niat ( real intention and in many time goes to subconscious level)," Ibadah depends on Niat, what ever perfect the action of Ibadah, if the real intention is not toward Allah, then our Ibadah will be rejected.
I dont talk about current Sufism branch with their own rituals like Dzikir in masses and others, that is like som Sufi master can reach closeness to God by using that kind of practice, but I dont do that despite I understand the intention cleaning heart in Sufism
I give one example, many great Sufis abandon their life in order to clean their heart. I mean when you have families, job, etc do you notice your life is actually intended to get ridho Allah or ridho of your wife ?
I dont recommended what Sufis is doing like in the past abandoning their jobs and others, but the motive is well acknowledge by me, but we can do cleaning of our heart in not extreme way and all of has already been there in Quran verses and Hadith.
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While in other hand, Wahabism is also important, because it tries to make people who has been too much following Sufis rituals go back to mainstream Islam and make our religion more simple.
The best way is the combination of Wahhabism with their strict rule, and the stress of the important of niat ( intention ) in our life where in Quran it is said that whole of our life is Ibadah to Allah, not to Government, not to get respect from wife or siblings/ families