The obligation of a person toward the religious innovations (bid'ah) prevalent in his country

Question:
May Allah reward you. This questioner says in this question: Honorable Shaykh, I am unable to forbid the religious innovations (bid'ah) prevalent in my country, and that is because of the argumentation that occurs among the people. They do not understand the objectives of the Shari'ah or the meaning of authority, and they place no value on the description of the authentic Sunnah. So, am I sinful for leaving off the forbidding of the religious innovations (bid'ah)?

Answer:
If you have knowledge, understanding, and jurisprudence in the religion of Allah, then you must study the beneficial knowledge for the people, teach them the correct creed, and clarify to them the false creeds, and that is through lessons. You hold lessons in the mosque, and even if only a few attend with you, the good will spread and extend. You must engage in sincere advice along with the lesson. You must engage in sincere advice in the best manner, and clarification to the people, and patience with that, and persistence. For the good is present, and the people are not all such that they do not accept the good. Rather, among them are those who accept the good, and among them are those who will be guided by the permission of Allah. So do not despair of their guidance. Yes.