ولوﻻ أن يكون الناس أمة واحدة
And were it not that mankind would have become of one community,
means, `were it not for the fact that many ignorant people would think that Our giving them wealth was a sign that We love the person to whom We give it, and thus they would have agreed upon disbelief for the sake of wealth.'
This is the view of Ibn Abbas, Al-Hasan, Qatadah, As-Suddi and others.
لجعلنا لمن يكفر بالرحمن
لبيوتهم سقفا من فضة ومعارج
We would have provided for those who disbelieve in the Most Gracious, silver roofs for their houses, and elevators,
means, ladders and staircases of silver.
This was the view of Ibn Abbas, Mujahid, Qatadah, As-Suddi, Ibn Zayd and others.
عليها يظهرون
whereby they ascend, (means, go up)