An important matter for Muslims to realize is that da`wah is an obligation upon them. Allah (subhaanahu wa ta`aalaa) says in the Qur'an:
"Invite to the Way of your Lord (i.e. Islam) with wisdom and fair preaching, and argue with them in a way that is better. Truly, your Lord knows best who has gone astray from His Path, and He is the Best Aware of those who are guided." [al-Qur'an, an-Nisaa' (16):125]
Du'as for danger
*What to say when in fear of people: "Allahummakfineehim bima shi’ta"
O Allah, protect me from them with what You choose.
Aameen!