The term "Messianic Christians" is a misnomer. Here is a quote from the Q & A of one of The Berean Call Newsletters explaining why:
Of course the words "rapture" and "trinity" are not in the Bible-but the concepts are clearly taught there. In contrast, the idea that there is something special about Jewish believers in Christ, who therefore qualify to be called "Messianic," is contrary to Scripture. You say that "Messianic" and "Christian" mean the same thing. Not by their usage they don't. You would not refer to a "Christian Christian," but the term "Messianic Christian" is accepted. That belies what you say. I sympathize with the antipathy Jews have toward "Christians," but that is based upon a gross misunderstanding fostered for generations. Isn't it time that Jews who know better should explain to their fellow Jews that the Nazis and all others who have ever persecuted and killed Christ's brethren, the Jews, were not true Christians?!
https://www.thebereancall.org/content/question-your-article-concerning-messianic-jewish-practices-andor-messianicsyou-write-subjec
Read the entire Q & A on that link.
Here's the original question:
Nov 1 2007
Question: In your article concerning Messianic Jewish practices and/or Messianics...you write on a subject that you are not really qualified to speak on....It is correct that the Passover was given to the Jewish people as a remembrance of the Exodus and...was obligatory to Jews only....However, as part of our freedom in the Messiah, both Jews and Gentiles may observe it or not and you have no biblical authority to say otherwise.
When you say that you "reject categorically the very word ‘Messianic,'" you are showing the very ignorance you have affirmed elsewhere: that you have no knowledge of the original Hebrew and Greek. You...reject the word because "it is not found in the Bible." Do you realize how foolish that argument is? The word "rapture" is not found in the Bible, nor the word "Trinity"....
The terms "Messianic" and "Christian" mean the same thing, but one originates from a Hebrew source, the other from a Greek source....To be strictly biblical, you should drop the word "Christian" and use the term "saints...." You also say, "Unfortunately, ‘Messianic-whatever' implies that observing Jewish practices insures that one will be closer to God-and often becomes an excuse for imposing the Law and Jewish observances upon Gentile Christians." This is simply nonsense. Those who make such claims will be a small minority. Many of us Messianic Jews do not impose the Law and Jewish observances on anyone including ourselves since we firmly believe the Mosaic Law ended at Messiah's death...you are free to do it or not and you cannot claim it is forbidden [without] a clear Scripture...and [there is none].
Jesus is the Messiah and Jesus is the Christ...one is free to use the term "Christian" or "Messianic" and both mean the same thing. But we Jews who suffered heavily at the hands of those who called themselves "Christians" choose not to identify ourselves unnecessarily with the persecutors. "Messianic" does not carry that kind of baggage and we are free to use it...and you have no biblical basis for claiming that it is not a permitted word....
One other incredible statement you make is, "it is presently impossible for anyone to be ‘Messianic' because all who believe in Christ (Jew or Gentile) are in the church, with Christ ruling as Lord in their hearts." This is an incredibly ignorant statement....You may just as well say it is "presently impossible for anyone to be Christian, because all who believe in Christ...etc."
Again, you have written an article you are not really qualified to speak to and was certainly not helpful for those of us who are dispensational and Messianic Jews....Based upon the letters I am getting, you have disturbed a lot of people....In the future you might want to stay in your own area of expertise....Dispensationalists have not understood the position or role of Jewish believers in this age, and the kind of article you have chosen to write will [not] help the matter.