Not only Isaiah 56 but all of the Torah cries out to us to reach out to our fellow Jews, Hebrews (incl. those lost souls of Judah and the House of 10-Israel) and all the nations.
We need to be an educative ‘Light to the Nations’.
Here is but a small sampling of the exhaustive sources that are available in the vast library of Jewish Writings.
Our Giants of mind and soul, the Jewish Sages, and our current remnant covenantal faith action community have much to say on the above.