WI/AHC: Rise of Sabbatianism

In 1648, a Jew named Sabbatai Zevi declared himself the long-awaited messiah. He gathered many followers in a short time. In 1651, the rabbis expelled Sabbatai and his followers from Smyrna.
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Today, Sabbateanism is the 3rd most widespread religion in the world.

Fill in the gaps.
 
Sabbathai continues his work and finally Ottoman authorities arrest him. Ottoman sultan tries pressure him to abandon his views (happened and succeeded in OTL) but Sabbathai refuses and he is executed publicly. He is seen sa martyr and soon his movement gets more and more followers.

But not ide ahow to get this being 3rd largest religion. Not sure if it is even possible.
 
I made a thread about this a few months ago. It wasn't as successful as I had hoped but there were a few suggestions.

 
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