Why Czech Blogs sucks?

I have been reading more than 20 blogs, approximately half of them in Czech and the rest in English. I have stop reading most of the Czech blogs, because they suck. It puzzles me - what so different? Why most of the Czech bloggers are offensive, aggressive and often wrong?
Maybe I know only those blogs in English who are very successful and thus passed the "test by audience" that Czech blogs do not have to pass to be known, simply because there is not that many Czech readers.
I don't think this is the whole story. I suspect that there is something about our culture and schooling that makes us unable to discuss (I'm not that much different, probably - it's a matter of culture, not a language).
The list of blogs I have been reading but stopped:
Pooh.cz
Pixy.cz(and clones at respekt.cz),
Ivo Lukacovic Blog
Jiri Pallas

and many other I do not remember anymore...
The "best" blog I have never read (Radek Hulan's Ego, aka the one who shall not be named), because you have to be brain dead to do so.