1- The words “Tasawwuf” and “Sufism” are modern terms which refer to something that is not automatically approved of in the Shari’ah neither is it automatically condemned. 2- Jama'at al-Tabligh is one of the groups that is active in the field of da’wah, calling people to Allah. They do a great deal of good and make commendable efforts. But this group is not free of some innovations in knowledge and action. For more about Sufism and Jama'at al-Tabligh, see the detailed answer