Assalamu Alaykum
The Noble Shaykh al-ʿAllāmah Ṣāliḥ al-Fawzān was asked,
[Q]: May Allah bestow good upon you, the questioner asks: Some callers (duʿāt) in our land have become known by way of lectures, tapes and social media, and in there call there are errors, which are in opposition to the Sunnah and the ʿAqīdah (correct belief). When we refute their falsehood coupled with proofs and evidences (people) say ‘This person is a caller to Islam and has done for Islam what you all have not done, so why do you criticize him?’