Regarding how one should respond to those who raise objections against the effort of da’wat and tableegh, Hazrat Shaikh Moulana Muhammad Zakariyya (rahmatullahi ‘alaih) once wrote the following advice to a person engaged in this noble effort:
You must remain focused and engrossed in your work and must continue with your efforts. Do not ever try to engage in debates with others, criticize them or become embroiled in arguments with them.
If any person criticizes or objects to the effort of da’wat and tableegh, then you should respond by saying, “Refer your objections to the markaz (i.e. the elders of the markaz). This effort has been shown to us and taught to us by reliable Ulama in whom we have confidence.” Also ensure that you recite Durood Shareef in abundance.
Insha Allah, responding in this manner will prove extremely beneficial and effective in eliminating wrong practices and innovations entering the work of tableegh.
(Qutbul Aqtaab Hazrat Sheikhul Hadith Moulana Muhammad Zakariyya (rahmatullahi ‘alaih) pg. 378)