B737 pilot reported a one-inch crack on the captains L1 window inner pane during cruise. Flight diverted.

Narrative

While in cruise approximately 2 hours from ZZZ at FL 360 the CA noticed a small crack or scratch in the L1 window. The CA after noticing the defect inspected the crack. It was less than an inch long. We determined the 'crack' was very small; and looked to be surface level on the inner most pane. The CA and I trying to find more information is we referred to the manual. After examining the crack further we determined it was on the inside plane of the window. The crack was bearly noticeable when touched. It was only perceptible when scrapped with a finger nail. We took some time to discuss our next steps. At no time during the flight did I think the flight was at immediate risk. We took a little measurement to make sure it the crack wasn't growing. We decided to look at the appropriate checklist for window damage forward. Once we read through the checklist we decided we needed more information. The checklist leads to a decent and diversion which seemed drastic for a small crack that didn't seem to be growing at all. We decided to have dispatch call us; and loop in Maintenance Control for a huddle. The CA was flying at the time; so once we decided to talk to dispatch and Maintenance Control he handed the airline and radios over to me. I had the volume for the call on low; I did not hear a majority of what was said in the first conversation because there was a lot of frequency changes happening. We had just passed ZZZ1 at this point heading towards ZZZ2 . From what I understood of the conversation Maintenance Control seemed to agree that the crack wasn't a structural issue. We agreed that we would all be comfortable in continuing the flight as planned. We would monitor the cabin pressure and the crack to insure it was not growing. If anything changed we would immediately follow the window damage checklist. After the conversation concluded I handed back to aircraft to the CA. We continued the flight checking on said crack every 15 minutes. Approximately 20 minutes later we received a very worried acars message from dispatch about if we were all looking at the same checklist. Both the CA and I were confused about the message; so we had dispatch call us again. The CA handed the airplane; and radios back to me. I listened again to the conversation with dispatch the best that I could. The CA and I agreed that a diversion for an hardly discernible crack seems excessive. The window showed no changes since we noticed the crack initially. From what I could hear of the conversation the dispatcher sounded nervous about our decision to continue . I could hear the dispatcher insisting that we follow the window damage checklist. After the dispatcher voiced more concern for the current plan the CA asked for an duty pilot to be added to the call for a second opinion. After hearing all the details the Chief Pilot advise was to follow the non-normal checklist. Both the Chief Pilot and dispatcher were really pressuring us to divert. They kept insisting on following the checklist; and diverting to another airport. At this point we were an hour away from ZZZ. Based on where we were it made more sense to continue to ZZZ than to divert. The Chief Pilot and dispatch were very insistent on the diversion. The CA and I took a little aside; and decided with all the information we had it was the most conservative decision to divert. After the decision was made the CA handed the aircraft and radios back to me; while he ran the checklist. We were able to safely divert; decend; and land at ZZZ3 without incident. We did not declare an emergency; we felt that was unnecessary. There was at no point during the flight I felt the safety of the flight was in question. Post flight we debrief was conducted with the duty pilot and dispatch.