They have not seen the work from close/has not gone in the path of Allah with Tabligh.
May Allah Pardon them and give them chance to see from close.
ALLAH pak says in surah ASRA
And do not follow a thing about which you have no knowledge. Surely, the ear, the eye and the heart - each one of them shall be interrogated about. [17:36]
Very clear Hadith is there in Saheeh Muslim
The prohibition of speaking about everything that one hears.Matan of Hadeeth starts with
“KAFA BILAMRE KAZIBAN……………………………(MUSLIM SHAREEF)
(Translation ) “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘It is sufficient lying for a man to speak of everything that he hears.’”
(As translated in Riyazussaliheen translation)
May Allah save all muslims for spreading any wrong information,and save from demand of the Akhrat.