Allah mentions in the quran 'do not divide the religion and make sects' amongst many things.
where did this idea come from where you incorporate dancing amongst your dhikir? Where did this nonsense come from where you get these sufi saints and orders with their own school of thought interceding for you in qiyamah. have you seen folks like nazim al haqqani? One of my friends is an ardent folllower. Who believes haqqani will intercede for him. He also has the knowledge of the unseen.
Sufism is just biddah. Islam ended on the day of arafat. The deen is complete and finished. Anything after that is biddah
I think to begin my response I should emphasise something about this discussion. This issue is one of great gravity, the declaration of entire groups and practises as being deviant is an immense one indeed. Traditionally it was something done only in very dire circumstances... and confined to those with the rank of Qadi. In this respect, any generalisations need to be taken with the utmost caution. The act of declaring another Muslim a deviant has consequences not only for the accused, but also for the accuser.
With this in mind, the first point is the definition of terms. You use many, without distinction. The first is quoting the Qur'an regarding sects, yet you do not define what constitutes a 'sect'. Do all groupings within the Muslims become 'sects'? By being from the Ahlul-Sunnah wa Jamaat, am I a sectarian or schizmatic? What about following a madhab? Is that a sect... if so, then by your implication, all of us are in hot water! Even those who claim not to be of a madhab, still have that claim as their madhab!
Secondly, we have a range of assumptions that are not supported, they are as follows:
-All sufis dance while making dhikr
-Sufi 'saints' have their own school of thought.
-The idea of intercession is throughout Sufism
-Nazim Haqqani represents all Sufis
-The fact that the deen is complete means that anything that Muslims do after that is 'innovation' a term that you use as inherently negative.
These are problematic assumptions as you take an individual Sheikh or 'Sufi' group, and base your assumptions about all Sufis on that group. I will bold this for emphasis:
this is not a valid assumption. This generalisation, invalid as it is, is sufficient to dismiss your claims.
Not all people who practice Tasawuf do any of the the things that you describe. Thus your assertion that they are all deviants is unfounded. This general condemnation is dangerous for you, and I warn you away from it, for the sake of God.
Additionally, your idea of 'bidaah' has many problematic ideas within it. Indeed by your definition, you condemn our Masters, the Caliphs Abu Bakr, Umar, Uthman and Ali (radiAllahu anhu) to the rank of deviants. As they 'added' things.
They added tashkilat to the Qur'an, they compiled it in a single comprehensive volume. They used analogical reasoning to make rulings on things not ruled on directly by the Messenger of Allah (sullAllahu alayhi wasalaam). They moved Jumaah from the house of the Messenger of Allah (sullAllahu alayhi wasalaam) to the masjid, something they described as 'the best of innovations'.
Even then, you essentially condemn further those that followed them. Those that created the schools of law, those that compiled the hadith, and all the rest as innovators and deviants.
Do you not see this folly? Ibn Tamiyya spoke highly of the Sufis, Imam Nawawi was one, as was Ghazzali, indeed Islam would likely not remain in the subcontinent intact were it not for Sufis like the great reviver Ahmad Sirhindi. To dismiss all the above as deviants is a very grave affair, something that should be confined to people of knowledge, and done only under great consideration.
Be wary, for this is a path where feet slip.
And Allah knows best.