@SeichalHaYashar
Additionally the Rebbe says it’s a minhag of chassidim to believe their Rebbe is moshiach and that we follow this custom. Also the Rebbe brings a story about someone who said the Previous Rebbe was moshiach and someone getting upset and the Rebbe defended that Chosid. Additionally rabbi Groner was told over and over again by misnagdim that the Rebbe isn’t moshiach and rabbi Groner said it’s normal to believe it and quoted a Gemara Sanhedrin. These rabbanim said “there is no such Gemara” and when he showed them they shut their mouths. Rabbi Groner reported back to the Rebbe and the Rebbe mentioned at the fabrengen that there are people who haven’t thought about moshiach in so long that they didn’t know a simple point about moshiach mentioned in the Gemara. All that said, I tend to think I interpreted that letter correctly.