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I think whoever made the famous Vulcan hand salute, or the vulcan salute, as they call it, was Jewish. According to Patheos: The Vulcan “live long and prosper” salute is based upon a blessing gesture used by the Jewish priests (kohanim) during the worship service, and was created by Leonard Nimoy (Spock), who drew on his on childhood synagogue experiences for the inspiration. If you want to know more about it, go to the link above, it will tell you more about the Vulcan hand salute. But now why did they choose this amazing handshake as the Vulcan’s handshake, and what does Live long and prosper mean? According to The phrase finder, the live long and prosper thing is an abbreviated version of a traditional Jewish religious blessing. It came to a wider public in the Star Trek TV series. It was used there by the character Mr. Spock (actor Leonard Nimoy, himself Jewish) as the greeting of the Vulcan people.
The phrase was the accompanying spoken greeting/blessing to the hand gesture called the Vulcan salute. ‘Live long and prosper’ is translated, if that is the correct word, from the Vulcan language phrase ‘dif-tor heh smusma‘, which was so uttered in Star Trek: The Motion Picture. The phrase echoes the Hebrew ‘Shalom aleichem’ and the Arabic ‘Salaam alaykum’, which roughly translate as ‘peace be upon you’.
To learn more, here are some websites with a post about the vulcan hand salute, including the websites with the posts I used for this post: