Rigid beliefs will keep people from each other, they will maintain that each are different. People will think that their way is right while others are wrong. Some will be accepted while others are rejected. This is seen in religion most noticeably.
The idea of separateness is taught and developed over time which grows a chasm between us all. It’s based on skin color, gender, the group affiliated with. People adopt the beliefs of others, hoping to fit in, to belong.
Duality is the culprit much of the time, good and bad, right and wrong, in or out. Whole societies are molded from this and there are those who never even question it.
Leave the heart door open. Shutting it down to anyone based on their looks or sects associated with takes away opportunity which can benefit all parties. Life is about assisting each other, not claiming authority over anyone, but in sharing what we know so that all may rise.