Thank you for inviting me to the marriage reception for your son ____ and his bride.
I am unwilling to ratify anything that smacks of neo-"halachic" Christianity, such as the wedding
invitation with the "yechi" messianist slogan on the envelope.
You apparently have embraced the delusional and false belief that the dead Rebbe of Lubavitch, zatzal, is, was, or can be mashiach. I see this belief as a dangerous deviation from Judaism which I cannot endorse or support, even implicitly, and I therefore will not attend this reception.
Had I realized that ____ [another San Francisco Chabad shaliach family's] previous invitation included a bizarre
messianic reference to the late Rebbe (in Hebrew or Aramaic) [I now think it was actually in Hebrew and/or Yiddish], I would not have participated in that event either.
I didn’t try to become a baal teshuva so that I could be a neo-Christian or support neo-Christianity.
But it doesn't stop there – the family answered
Read it all here.
[Hat Tip: Joel Katz.]