Asalam o Alykum wa rehmatullah
hmmm well much could be said
simplest answer i could give will be
As Allah says in HOly Quran
Surah Al imran (3) verse 104
Let there arise out of you a group of people inviting to all that is good (Islâm), enjoining Al-Ma‘rûf (i.e. Islâmic Monotheism and all that Islâm orders one to do) and forbidding Al-Munkar (polytheism and disbelief and all that Islâm has forbidden). And it is they who are the successful.
then further u read ,u come to verse 110 ,same chapter
You [true believers in Islâmic Monotheism, and real followers of Prophet Muhammad صلى الله عليه وسلم) and his Sunnah] are the best of peoples ever raised up for mankind; you enjoin Al-Ma‘rûf (i.e. Islâmic Monotheism and all that Islâm has ordained) and forbid Al-Munkar (polytheism, disbelief and all that Islâm has forbidden), and you believe in Allâh[1]. And had the people of the Scripture (Jews and Christians) believed, it would have been better for them; among them are some who have faith, but most of them are Al-Fâsiqûn (disobedient to Allâh - and rebellious against Allâh’s Command).
hope this helps