Well, that's interesting. It was, indeed, truncated. But it wasn't truncated due to an apostrophe or an illegal character. It was truncated due to being an excessively long post.

The HLP forum database runs in MySQL, and the message body uses the TEXT data type. This is allowed to contain arbitrary text data up to a maximum length of 65535. It just so happens that the truncated content of that post is 65535 bytes long. Storing a longer message is not possible unless the data type is changed to MEDIUMTEXT or LONGTEXT.
The Shivan Manifesto was written in 2003. I would speculate that the truncation happened when we moved from vBulletin to SMF in late 2005. So unless anyone has archived the full copy of the Shivan Manifesto, you may have to resign yourselves to the first 65535 bytes of it.
(As a bit of trivia, the largest post in HLP history was probably when Stryke 9 posted the complete text of David Copperfield. Yes, the complete text. Apparently, it overran his clipboard buffer, so he had to type the last few chapters by hand. It ended up wreaking minor havoc with the database until one of the admins deleted it.)