If you will apply that simple tool I wrote to you about, you will see that the passages spoken before the New Covenant was sealed with His blood shed at Calvary and the passages spoken after the New Covenant is in force do in fact line up with what the Lady posted to you all. The meaning of ‘brethren’ and neighbor and brother is to be understood according to what covenant was in force when spoken. The New Testament epistles were addressed to the brethren. And that is what she wrote.
Dispenationalism is a teaching tool that began in the Nineteenth Century as a protest against Protestantism, as it were. Your toolset has a problem in its lack of apostolic provenance.