Some of the western duʿāt say when they are inviting the non-Muslims to Islam and tawḥīd of Allah, that the non-Muslims tell them “We do not believe in the existence of a Lord at all..” So what is the correct path in giving daʿwah to these people?

Shaykh Ṣāliḥ ibn Fawzān al-Fawzān:

If they do not know of a Lord at all then leave them. Do not be ambitious with those people. Those people are atheists.