Do we really believe that Jesus, the master teacher, was using some form of hidden psychology with His statement about loving your neighbor? If so, would He not have taken time here--or at least somewhere--to explain the necessity of self love, and what it might look like? By following this line of thinking, we have only added insult to our ignorance.
Popular psychology introduced a concept in the late '70s that swept through society at light speed. Once people in the Church got hold of it, it became a tsunami that crashed through at warp speed, taking down long-held theological concepts. Now, we are beginning to see the fruit of this lie throughout society.