No He is telling YOU to love one and other. To stop the horrible manner in which you speak to brothers and sisters, He is not telling you to sell everything. Your lack of love will be accompanied with a lack of understanding for as long as you dont love one and other.
Except...that is not what He said.
The question: "What shall I do to inherit eternal life"
The answer: "One thing thou lackest...sell whatsoever thou hast"
Stranger