What you've posted makes so many (probably false and certainly uncharitable) assumptions, and your comments have been mostly name-calling. This goes against both the spirit and rules of the site. If that's what you mean by "continue", then you shouldn't.

Your characterization is accurate. It's a feelgood email, probably meant to help people be cheerful for the stressful presentations.

All that said, you would've had a better post by talking about what content you think should've been in the email or by talking about why you found a simple "Folks, don't let the bastards get you down" to be insulting.