Whether we believe it or not, we are all connected at some level.
What we see in others is usually what we believe about ourselves.
There's a saying in Spanish that I'll translate as best I can: "The thief judges by its own condition."
And we all do this, until we begin to realize the truth of our oneness and choose to see another beyond their personality to their divinity. This practice then helps us see ourselves in this same light. This is healing.