It's not THAT you disagree. It's the way in which you disagree. You are thoughtless in the way you word your arguments, implying and outright calling the other side stupid, among other things. In the eyes of others, you too are seen as ignoring the relevance of someone's else response has in regard to points you may have raised.
You can feel that you are being shut down all you want, but inflammatory language whose intent/effect is to put the other side down instead of arguing completely rationally will only get you in trouble, as it has.