It is common part of dua of Tablighi jamaat elders that whosoever is working for deen in different field by different methods,give them Ikhlas,May allah accept them all and making them means give Hidayat for Mankind(Urdu words…O,Allah deen ke liye jis jis line mein mehnat ho rahi hai unko qabool farma Ikhlas ata farma aur usko zarie bahane ke taur par qabul karke Insanon ki Hidayat ke Faisle Farma,) .Recently also in book priceless Advice for all dawah worker. which is collection of talk of Maulana Saad Sb of Nizamuddin markaz has stressed and clarified it.It is very good book for all workers of deen in different field and not only tablighi worker. All daee will get benefit from this book.For downloading book in ENGLISH click HERE
Actually co-operation is needed in people working in the different field of Dawah/Any other field of Islam.
They should co-operate each other on good and short comings should be pointed out in a way suggested for Nahi Anil Munkar by the Quran,Ahadith life of prophet and Salafus Salejhin.