Paul made clear he had nothing to do with any other sect of Christians (interpolations aside) and only after 14 years of preaching did he attempt to influence/recruit the leading men of the Jerusalem Jews that had some similarity to his movement. A careful study of the suspected additions and glosses reveals an effort to do this type of revisioning.
With regards to suspected additions, how are they suspected to be additions?
And as a side note, Ehrman comes to the conclusion that there was no concerted conspiracy to revise scripture as so many say. Almost all the additions are non-doctrinal and thanks to modern manuscriptology, we have eliminated most of those additions and revisions.