Kirino VS Ruri

Hi hi :)
As you know vídeos at youtube that are related to this animê are spread very fast ...

And some comments on some vídeos are some how VERY VERY rude such as :

"FU** KIRINO ALL TSUN TSUN AND SELFISH KIRINO RURI IS TSUN TSUN AND DERE DERE KIRINO SUCKS" *im sorry >_< i copied that from youtube TT_TT*

I know i am not worthy of saying which one is the best but why such a rude word will be posted on such great animê .

Whats wrong with kirino ?
Shes not all tsun tsun right ?
They dont know what Tsundere means probably .

So what do you think?