Dawah in principle is a duty of all muslims thats why we are
selected nation
You are the best peoples ever raised up for mankind. You enjoin
to good, and forbid evil, and you believe in Allah. (3:110) (Surah Ale Imran)
Invite to the way of your Rabb (Islam) with wisdom (with
the reasoning of the Quran) and excellent preaching and argue with them in a
way that is better. Truly, your Rabb knows best 'who has gone astray from His
Path, and He is the Vest Aware of those who are guided. (16:125).