You must understand what you are reading to ask this question as though it relates to it. "may be also construed." I do not belong to any labeled religion, but I do know if anyone who is a non-Jew converts to Judahism, and then continues to learn of Messiah and believe, having never known Him, he may be construed as a Messianic Jew.
Now, who in their right mind would consider being called a Jew as something untoward? Our master was a Jew. He IS King of the Jews. Although I belong to no named religion, by this understanding, anyone may call me a Jew, and all I could say back it is halleluyah.
It seems mostly people who oppose anything Jewish, in the sense of being fulfilled in Messiah, are the ones who like to categorize all the brethren into their imagined cubby holes.
This post, and my previous stem from believing Jesus Christ, not a majority prejudice of uninformable individuals who will not allow others to worship in the manner they have been lead by first the Holy Spirit, and then pursuing truth in the writings.
If you have read the Old Testament, also called the Tenakh, you already know God says on many occaions, I am your Savior, and I am your King. Those who have not read this are free to not believe me, but it is their duty to the Father to learn this on their own. In so saying, declaring these two profound declarations, we see a little more clearly Who our Salvation is. We are baptized in His name. He is One. He is the Father, the Son and the Holy Spirit. I know this for having embraced the Faith of Abraham as taught by Jesus Christ. His name means God's Salvation. Let us adore Him, and avoid quibbling about prejudged notions, or majority rule decisions not of the Holy Spirit. It is peer pressure that has brought on the great apostasy rampant this moment.