regarding the ruling on the manner of enjoining good and forbidding evil?

The Shaykh : In any case, one should fear Allah as much as he is able, and according to the benefit. Otherwise, it is well known that you will encounter many people engaged in what is wrong, which you know is wrong. Let us give an example of this with those who shave their beards. How often do you pass by men in the markets who have shaved their beards? Will you stop with every one of them and say, "O so-and-so, this is not permissible, and this is contrary to the guidance of the Prophet (peace and blessings be upon him)," and advise him? The answer?
The student: No.

The Shaykh : No, ... but if an opportunity arises, such as standing with him or the like, then point out the error to him. Yes, O ...