Don't you just love it on here, when people don't have a clue and talk out of their
.
If you follow the correct procedures, which in the case of the turn back, the crew did, you will have no problem with the window.
You are in fact in more danger when you get ready for the landing, as you are at a lower altitude and in danger of a bird hitting a cold window.
What cracks 9 times out of 10 is the glass coating and not the inner panel.
ZeBedie, summed it up perfectly in that you may by turning back, delay the outbound and return pax by 6 to 10 hours, or a day if you are unlucky.
If you carry on, you delay the inbound pax a minimum of 24 hours or maybe a lot more.
With the a/c out of service for a number of days down route, you will more than likely delay many more pax over the next few days also.