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Shaikh Fawzaan: Not Permissible for Salafee to teach/lecture at Masaajid that also allow Deviants, Innovators to teach/lecture!
Question: We have some masajid in Britain that bring a person who is upon the methodology of the Sunnah in order that he may teach or lecture people about Tawheed. Then on the following day, they will bring a Sufi or Ash’ari who will teach the people Sufi or Ash’ari ['aqeedah]. Is it permissible for this Sunni caller to teach in such a masjid?
Shaikh Saalih ibn Fawzaan al-Fawzaan (hafidhahullaah) said: "No. If they [the masaajid] mix between him [the Sunni] and an innovator or a deviant, it is not permissible for him [to teach there]. This is because they are using him as a disguise. They are using him as a disguise. They say [to the people], ‘We teach Tawheed, and we listen to lectures in Tawheed!’
This is not correct, since this is mixing the truth and falsehood.
[The Sunni] should place a condition on them and say, ‘I will teach or deliver lectures for you on a condition that you do Not bring individuals whom are in opposition to that which I say [teach] to you and call you to."
Source: http://video.dusunnah.com/innovation...ih-al-fawzaan/