Is it permissible for me to boycott my cousins who call for going out with the Tabligh group?

Question:
He says: Honorable Shaykh, may Allah grant you success, is it permissible for me to boycott my cousins who call for going out with the Tabligh group, knowing that they are from this group?

Answer:
I advise them and explain to them that this is not fitting and is not permissible. Whoever wants good, good is available without the Tabligh group. It is available in the mosques, in the study circles, in sitting with the scholars. Good is available without what they are calling people to. Whoever is calling to Allah and has the readiness to call to Allah, nothing prevents him; the opportunity is open to him without him being associated with a group or a methodology or with…
The door is open for those who have the readiness, the strength, and the desire to call to Allah the Exalted and Majestic, without being associated with an organization or groups whose source is unknown, whose beliefs are unknown, and whose nature is unknown. In fact, things have become apparent from them, as is well known. People who were with them have turned away from them and explained what they have. So how do we remain with them now that their matter has become apparent, and those who were with them have abandoned them and mentioned the criticisms they have?
It is obligatory for you to advise these people. If they do not comply, leave them. Do not go to them until they abandon this thing.