First you think you know every Christian personally or something and that none of them have ever tried to force their religion on me, then you bring up the fact that because I have a certain origin I cannot debate an issue. I have an opinion, and I came here to voice it, not for people to tell me whats happened in my life and what I can and cannot comment on.
And as for the British Empire, that was a hundred years ago. How about you cant debate the evils of Islam because of the crusades? No, of course you have an opinion and a right to say it.