It's because the moderation team of this site has collectively decided that outside of this section, trolling and derailing threads needs to end. And it has to start somewhere.
Keep the bullshit in this section and everything is good. The other sections are on-topic and will be moderated that way.
As for the post you are crying about - you got a warning, not an infraction so no points. Next time it will be, and they add up quickly. Lastly, you aren't the only one who had a post deleted in that thread.
You may want to go out and buy some man pants yourself, because crying over your lovebug Phil is getting old.