Is the one who enters the mosque and begins by greeting the praying people before the greeting of the mosque sinful?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If I enter the mosque and greet the praying people first, before the two rak'ahs, am I not thereby sinful?

Answer:
It is contrary to what is preferred; this is contrary to what is preferred, and you will not be sinful, if Allah wills. Yes.