Actually, you will find that Pakistani Punjabis are now some of the most Islam obsessed. Perhaps their experience of partition played a role in it. Perhaps the muhajirs passed their hatred of India to them. Regardless, today, they are the most vociferous of the lot who want to disassociate from the land and live in borrowed glories and identities of other Musims.
You will find in rural and south punjab some people who changed their car's license plate to Arabic. The ones who most attend madrassas and support terror groups. In fact, if you look at Pakistanis who have committed religion-related crimes (bombings, etc) in the West, almost all of them were from Pakistan's Punjab region with notable inclusion of Mirpuris.