Simple question really but... Why are catholics so obsessed with getting protestants to quit their church and join theirs?
If you discovered that everyone who is biblical realized your organization was a cult, you might want them all to come back and play nice again, too. Sorry, marshmallow. What we returned to already is the biblical form of Christianity. Come and join us...if you can.
Personally, I don't care myself.
As it has been since the fall of adam, it is the goal of carnal man to control religious doctrine rather than just taking YHVH at His Word. By separating that of old and calling it just that “old”, “outdated” & “only for Jews”, Christendom created their ‘new’ religious dogma. As it has always been, the one that controls the religious dogma of the ‘new’ is the one that holds the power over the religious class.
It existed at the time of Messiah via the House of Shammai & the House of Hillel. The House of Shammai was in control and were killing members of the House of Hillel for following Torah rather than the dogma(oral traditions) of Shammai. It was the House of Shammai that covertly worked to kill Messiah not realizing that his death was not of their control but in under the control of the Creator who was controling them via their ignorance of the prophecy of Messiah as they held their religious dogma as having higher authority than that of the Creator. The RCC is Christendom's House of Shammai and while they do not promote death, they do seek to regain control over all religious dogma.
Catholic-Protestant reunion will never happen.