The term "petty differences" refers to small and unimportant disagreements or conflicts between people. These differences are not significant or significant enough to warrant attention or effort to resolve them. Full definition
So we've spent a good deal of time in court or arguing over petty differences. (gardengnomepubs.com)
If we were strong enough to rid ourselves of petty differences and looked for the best in everyone life on earth can be the heaven that most seek. (religion.blogs.cnn.com)