Interesting. The case for Yahshuah (Yah meaning Yahweh, or YHWH, shuah meaning salvation), over Jesus is solid, there's no J sound in Hebrew or Aramaic, never has been. It may be a case where, like in Roman and Greek (as well as Egyptian) times the pagans created supergods out of the combination of two gods, perhaps Jesus is Jehovah Zeus?
Actually the J sound, originally pronounced as Y, is recent to English as well, as in no older than a few hundred years. Of course that also means Jehovah isn't the name either, it's Yahweh as made note of in the callsign, Hebrew has no vowels per se, just what are called vowel points so Yahweh is the phonetic transliteration of YHWH.
And then there's the case of the christian Sabbath, Sunday, the pagan day of sun worship. The Sabbath is from Friday sundown to Saturday sundown, and Yahshuah always observed the Sabbath. Imagine building entire religious industries around falsehoods. So technically, the christians have a lot of their core doctrine based upon error and their leadership knows all of this.