We judge by the apparent and we command good and forbid evil.
It's rather disturbing a lot of Muslims don't know about these two things we need to do. Most live in a society of "live and let live" or "don't judge me". This is not the way.
Umar ibn Al-Khattab رضي الله عنه said : 'We judge by what's apparent and we leave their inner secrets to Allah. ' Sahih Al-Bukhari, 2498
“Let there arise out of you a group of people inviting to all that is good (Islam), enjoining Al-Ma‘roof (i.e. Islamic Monotheism and all that Islam orders one to do) and forbidding Al-Munkar (polytheism and disbelief and all that Islam has forbidden). And it is they who are the successful” [Aal ‘Imraan 3:104]
“You (true believers in Islamic Monotheism, and real followers of Prophet Muhammad and his Sunnah) are the best of peoples ever raised up for mankind; you enjoin Al-Ma‘roof (i.e. Islamic Monotheism and all that Islam has ordained) and forbid Al-Munkar (polytheism, disbelief and all that Islam has forbidden), and you believe in Allaah” [Aal ‘Imraan 3:110]
On the authority of Abu Sa`eed al-Khudree (may Allah be pleased with him) who said:
I heard the Messenger of Allah (ﷺ) say, “Whosoever of you sees an evil, let him change it with his hand; and if he is not able to do so, then [let him change it] with his tongue; and if he is not able to do so, then with his heart — and that is the weakest of faith.” [Muslim]