Questions and Answers

If by "Sufism" you mean purification of the soul, then Zaydism is not opposed to that! Indeed, many of our imams and scholars have attained what the Sufis would call "wilayat" through spiritual exercises and gnosis (ma'rifa) of their Lord. As a result, some of them were able to do miracles! 

We refer to this as zuhd [i.e. indifference towards this world (dunya)]. Indeed, zuhd is a qualification for the imam. However, the ability to perform miracles is not a qualification. Miracles are just possible consequences of their spirituality. 

We have powerful duas and awrâd from our imams and scholars that are sufficient for one on the spiritual path! We do need murshids or brotherhoods to reach gnosis of our Lord!

If by Sufism you mean following a murshid or sheikh blindly, Zaydism is opposed to such! This is because the greatest bounty is our minds and intellect. If we forsake our intellect to blindly follow some "Sufi shaykh" or "pir sahib", we have no one to blame except ourselves if we are misguided!

It must also be said that historically "Sufis" have played a role in the destabilization of the Zaydi imamate. For example, in the Yemeni consciousness, the Zaydis saw Sufism as being equated with the Ottoman rule. So when the Ottomans dominated Yemen, the imams were a bit suspect of Sufism.