How much do you have to hate your neighbor to build these houses.

In the Gospel of Mark, chapter 12, verse 31, Jesus said, "Love your neighbor as you love yourself," was the second greatest command after loving God. Though I've always thought of the opposite of love at hate, spite comes in at a close second; and, in fact, is so closely related, it makes me wonder: how much does a person have to hate their neighbor to built one of these homes out of spite? I'm pretty certain, this is not exactly what Jesus had in mind.