I think he goes by Itzhak (Tzahi) Shapira not "Yitzchak."  His supposed simcha is from a Christian organization called the  International Alliance of Messianic Congregations and Synagogues (IAMCS).    From Jews for Judaism:

Shapira (and other so called "Messianic Rabbis") claims to hold full rabbinic ‘smicha’ (rabbinical ordination) from the International Alliance of Messianic Congregations and Synagogues (IAMCS). In recent years, this Hebrew-Christian movement, also generically known as Hebrew-Christianity, Jews for Jesus or Messianic Judaism, has become extremely large and powerful movement in Christianity. As a result, Protestant Christian umbrella organizations, such as IAMCS and the other Christian Bible Colleges that oversee “Jewish evangelism” no longer ordain their clergy as “Minister, Pastor, Reverend” and choose only the “Rabbi” designation.

Christian missionaries dedicated to converting Jews to Christianity use “Rabbi” with complete impunity because they truly believe they are doing nothing dishonest or deceptive. Nevertheless, the stark reality remains. Their ordinations are from the Protestant, Evangelical, and “born-again” New Testament-believing church organizations and have no relevance or authority in Jewish theology.


סופי

And everything that Sarah tells you, listen to her voice. Bereshit (Genesis) 21:12