Complex sentence: The vast majority rejected the Covenant, as is highlighted (as told in John 19:15) when their leaders scream out,'We have no king but Caesar!' The Covenant was continued in the few Jews who remained faithful to it by recognizing the Messiah.
Split into simpler sentences: The vast majority rejected the covenant, as is highlighted (as told in John 19:15) when their leaders scream out "We have no king but Caesar!" The Covenant was continued in the few Jews who remained faithful to it by recognizing the Messiah.