'Insincerely' in the Bible

The rest of the Jews joined him in this hypocrisy [ignoring their knowledge that Jewish and Gentile Christians were united, under the new covenant, into one faith], with the result that even Barnabas was carried away by their hypocrisy.

but the former preach Christ [insincerely] out of selfish ambition [just self-promotion], thinking that they are causing me distress in my imprisonment.