Jama’at al-Tableegh do not have proper understanding of the issues of Aqeedah, so it is not permissible to go out with them, except for one who has knowledge and understanding of the correct -
Its interesting how Shaykh hasn't exactly condemned Tabligh but has indicated towards issued held by people involving themselves in Tabligh, which i completely agree with.
Shaykh was also asked:
"If the people mentioned are known to have sound Aqeedah and knowledge and to be virtuous and good people, then there is nothing wrong with cooperating with them in calling people to Allah -
“Help you one another in virtue, righteousness & piety”
& the Prophet ﷺ said: “Whoever guides others to do something good, he will have a reward like that of the one who does it.”
May Allah guide us all.