Well, your comment was almost completely content-free. Perhaps a down-mod is unjustified, but why bother posting the comment in the first place?

in what world is exactly not allowed to show your enthousiam? and what is content-free anyways?

is there a law i must always contribute 2 million paragraphs to show my opinion?

It's not that you're not allowed to show "enthousiam"; the point is that you might get downmodded if your comment doesn't contribute anything meaningful to the discussion. Expressing your opinion is all well and good, but why post a comment if you don't have anything interesting to say?

(And IMHO whining about downmodding doesn't exactly help your case.)