Why do mods remove certain posts with no explanation?

r/conspiracy has this description:
This is a forum for free thinking and for discussing issues which have captured your imagination. Please respect other views and opinions, and keep an open mind. Our goal is to create a fairer and more transparent world for a better future.

seems a bit hypocritical?

https://www.reddit.com/r/conspiracy/comments/1rrkaf0/comment/oa0qiom/?context=3

A post about joining together was been removed by mods.

I made a post once about shapeshifters in hollywood, including links to specific threads: https://www.control-alt-history.com/articles/starchild-thread

original removed thread:
https://www.reddit.com/r/conspiracy/comments/1ie9wao/shapeshifters_control_hollywood/