Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him).
People affected by innovative beliefs are interfering in our dawah. How should we respond?
You should increase in dignity, serenity, humility and sincerity. You should want good for those who are in that state and ask Allah to improve their state. Do not get involved in debate and argumentation. Ignore their efforts to discredit you when this is more effective. If need be, clarify controversial issues without mentioning individuals and groups and their perspectives. If you are forced to mention individuals then do so as little as possible, only mention them briefly and avoid doing so in public. Reading the following repels harm:
حَسْبُنَا اللَّهُ وَنِعْمَ الْوَكِيل
Hasbunallahu wa n`am al-wakil
Allah is enough for us and He is the best One in whom we place our trust.
وأُفَوِّضُ أَمْرِي إلى الله إِنَّ اللّهَ بَصِيرٌ بِالعِباد
Wa ufawudu amri il’Allah inn’Allaha basirun bi’l-`ibad
I surrender my affair to Allah – surely Allah is ever watchful over His slaves