You are 90% wrong on this statement.
The lovely Lauren Southern is not American. She is Canadian.
As others have posted, she is hardly a SJW...she is libertarian/conservative.
The backstory on this is as a result of an assertion among leftists that Jesus was gay (and the non-reaction of society in general, Christians more specifically, and churches in particular) (examples here and here).
She wanted to see the reaction if this was tried with the leader of another major religion. She found her reaction.