We do not reject Jesus Christ. He is our Lord and Savior. Seriously, it's not rocket science. We reject the fourth- and fifth-century creeds that attempt to define the nature of God and the relationship between the Father and the Son. We do not claim to be part of traditional Christianity (those folks who believe that 1 + 1 + 1 = 1), but we do claim to be Christians and we have every right to do so -- with or without your blessing.
And for the record, don't think I haven't noticed that you continue to ignore the questions I've asked you very directly,
I've started ignoring more posts in this thread, both from you and from others, simply because I don't want to spend a lot of my day talking aobut Trinitarianism, a doctrine I find repugnant. This thread is simply starting to demand more effort than I'm wiling to put into it.
Why do Reform Jews still have a desire to call themselves Jews?
I am reluctant to speak for Reform Jews, since I am not personally Reform -- I'm non-denominational, just a regular ol' Jew who feels at home praying with ANY group of Jews. However, I will say just a couple things.
A Jew is a Jew because they are part of the People of Israel. It's a tribal thing, not a religious thing. There are in fact Jews who are atheists and who do not practice Judaism at all.
Judaism is basically the religion of the Jews. It is monotheistic (to a degree that something like Trinitarianism is compeltely unacceptable to us). Our primary text is the Torah, although it would not be Judaism if it did not also value the Tanakh as a whole, the Talmud in particular, and the words of the sages. Reform Judaism falls into that understanding. The differences between Reform, Conservative, and Orthodox are clearly denominational divisions, not the creation of other religions.