The fact that we are even having this discussion is a shame. How about this:
Captains: Don't be a jerk. Treat ALL FOs you fly with as seasoned professional pilots (which the majority of them are). Remember, we have all be Captains at some point. Treat others the way you would like to be treated.
FOs: Don't be a jerk. Treat the Captains you fly with as seasoned professional pilots (which the majority of them are). Remember that the Captain is the boss. Don't sweat the small stuff. Remember back at your previous job when you were a Captain...did you want your FO constantly complaining or challenging you on everything? Unless it is safety of flight related or dictated by procedure, why get spun up over a personal preference or technique that you don't like?
Seriously guys, this is not that difficult. It is not about age, background, or experience. It is about assigned roles and mutual respect.
If you are a Captain, be the Captain that you always wanted to fly with when you were a FO.
If you are a FO, be the FO that you always want to fly with when you are the Captain.
Not rocket science!