Why is it that when I try to "voice" an opinion it is routinely marked "unable to post your opinion"?

I would like to know why I seem to be blacklisted from expressing my opinion of news stories on my Yahoo homepage . I believe I follow the guidelines as good as any, and I know (judging by other posted opinions) that I follow them better than many . I do not promote hate or oppression , violence or bigotry and I refrain from the use of foul language. I am not trying to offend anyone . All I want is my "voice" to be heard and I am being denied this without any reason as to why that is so . I know not everyone will share my views on the world as I do not share some of theirs . I do not condemn them as I seem to have been . I would like ,and ,I believe I deserve an explanation for this censorship of my views.