Did you know Messianic Judaism (and their splits) are a
Protestant sect established by a Baptist minister to
convert the Jews?
The reason for the mix of Old Testament language and Protestant beliefs. A blending, if that is possible, of two disbelieving groups.
I recall reading something to that effect a few years ago, but frankly I never give them much thought and even less credence. I find a lot of their theology and practices to be more directed towards differentiating themselves from anything mainstream and thus attention whoring, than anything theological in nature. It is just another obscure group of people trying to be noticed.
Frankly, I wish they were more like the Amish, Menonites or Hutterites who rejected 21st century technology and remained off the internet and the theological forums.