And this is why it’s not always a good idea to listen to a Christian when they attempt to define Jewish theology. 
Numerous mistakes, some we’ve gone over to death. Judaism, for instance, holds as a central concept that God is one, not triune and certainly that God can’t have a child. Also, rather than being some angel that speaks for God, elohim is a name of God. Friar, coming to Jewish theology from the perspective of a non-Jew (much like many Christians whose goal isn’t so much to understand Judaism as it it to eliminate it and make Jews Christians) doesn’t understand how Judaism conceives of the moshiach and the messianic age.
Pointing to the things that God will do when the moshiach comes as a refutation of the messianic age is simply jabberwockian. The whole concept is that the moshiach’s arrival will signal the beginning of the messianic age and during that time, various things will happen by the will/might/what-have-you of God. If those things don’t happen, it aint the messianic age. And so if a claimant to the title comes and those things don’t happen, saying that God was supposed to do them anyways… totally misses the point.
But it does make a sort of sense if you’re a Christian who doesn’t grok Judaism. It’s worth reading the facts that rebut Christian missionary claims, as well.
And again, as we’ve done to death, there will be no ‘acceptance’ of Christians who claim to be Jews, because they’re not Jews. Jews accept Christians just fine. We just don’t accept Christians who pretend to be Jews.
And while we’re at it, readers should probably check up on Friar’s citations and see if they’re accurate.
Just taking one, let’s look at Daniel 9.
Now keep in mind that “messiah” is a Christian mis-translation and, in any case the time line is totally wrong for this prophecy to apply to Jesus.There was half a millennium between the Restoration of Jerusalem and the birth of Jesus. And rather than 62 weeks between his anointing and the destruction of Jerusalem, it was roughly 40 years past his death until the destruction of Jersualem. It was roughly 600 *years * between the rebuilding of Jerusalem under Cyrus and its destruction at the hands of the Romans in 70 CE. And Titus, the Roman general who led the siege and would later become Emperor didn’t die of a flood.
But aside from all that, sure, it’s totally a prophecy of Jesus.