The most likely religion conversion is judaism to christianity

The least likely is Hinduism to judaism

Charles F. Reitzel has written:

'Paul's conversion' -- subject(s): Conversion, Converts from Judaism, Christian converts from Judaism

For conversion to Reform Judaism, consult your local Reform rabbi. Since secular Jews have no organized 'ism' and tend to define Judaism purely in terms of ancestry, there is no real path to conversion to purely secular Judaism. Note that conversion to Reform Judaism is not quick and easy. Typically, it involves a long period of supervised study, including regular attendance at Jewish services, plus appearance before a beit din (a Jewish court overseen by 3 judges). You'll be warned that conversion is not required to be seen as righteous, and that by converting, you are exposing yourself to potential attack by antisemites.

Sounds like a Zen koan.

In Judaism, a Jew is fully a member of the Jewish people if he/she was born Jewish, or had a valid conversion into Judaism.

Religious Judaism holds that a Jew can most fully express and nurture their Judaism by living according to the Torah. This is called by several names: religious Judaism; Torah-Judaism; Orthodox Judaism.

Really, there is only one argument for converting to Judaism, and that is that you feel bound by the mitzvot (Jewish law). Conversion to Judaism is not about being saved (all that requires is living righteously, anyone can do that).