is their a freedom of all kinds of expression allow here

It depends on many things. For instance, _I read everyday political topics but, as I´m not an american resident, I don´t feel that I can answer it. It would be different if the topic was about international politics: there I have my say. It happens the same with many religious subjects. I ran into a post a long time ago, posted by someone who said that if we didn´t believe in what she did, we would all go to hell. How can you answer that? Telling her my thoughts about her, won´t help.. I´m pro peace. If I find a post that wants violence, I´d probably get involved in an answer. Happy posting!