How can one invite a Sufi Muslim brother, who is charitable, attends scholars' lessons regularly, given the difficulty of convincing Sufis and their accusation of Salafis with takfir, and without the support of scholars?

A caller to Allah needs knowledge and insight. He must possess insight into what he calls to, the condition of the one being called, and the methodology of calling.

The caller should not generalize in judging all of Sufism as misguidance; rather, he should be cautious in his speech and differentiate between its various categories.

The accusation against Salafis of declaring others disbelievers is a recurring one. Declaring someone a disbeliever when there is evidence for his disbelief is not a flaw. However, the methodology of Ahl al-Sunnah wal-Jama'ah does not declare anyone a disbeliever merely due to a sin, unless there is clear evidence, the conditions are met, and the impediments are absent.

If the caller does not possess sufficient knowledge for persuasion, he can convey the truth through beneficial books, convincing audio recordings, and by visiting scholars.

One should not despair of calling the one being called and guiding him, for many people have repented and returned to the truth after years.