Test yourself! A question on the mushriks of our time

Why are the mushriks of our time worse than the mushriks at the time of the Prophet sall Allaahu alaihi wa sallam?

Muhammad ibn Abdil Wahhaab gives one reason in Qawaaidul Arba-ah (The Four Principles). What proof does he bring?

See pages 4, 36, 37 and 53 of the Study Guide for the Four Principles for the answer.

Shaykh Saalih al Fawzaan gives another reason in the explanation. What is it?