I have never encountered a christian like Aloimeh IRL, and I've met quite a few christians.
Anyway, what I find frustrating, even tragic, is that these rough discussions never even have any progress. The thing with christianity is that, while you can like or dislike it as a religion, you cannot truly understand it until you have experienced it yourself. This is the reason for all misunderstandings and all the prejudice about christians being "brain washed".
Now, I'm not saying brain wash is not possible. I have talked to Jehovah's Witnesses who have looked at me with such blanc and empty eyes it was scary. It was like their mind was buried somewhere, I couldn't "see" the person I was talking to even if I had eye contact.
However the Bible actually encourages the reader to check if the things it says actually works. (With an open mind, that is. If someone is not really searching for God then probably nothing will happen. God will not violate the free will.)
I think this applies to all religions. Christianity - and in recent times, Islam - tends to get a bad rep because of people like Aloimeh and evangelists who insist on propagating their religion even when people aren't interested, and sometimes resorting to rather despicable ways to do so (example: denigrating another religion. This always annoys me. And telling people that they will go to hell if they don't convert. How is this supposed to make me want to be a Christian?).
I don't think all Christians are brainwashed. I do, however, think that there will always be certain people that subscribe to a particular faith, whatever it is, that are brainwashed by their religion. Look at those Islamic fundamentalists. Look at the morons who called for Salman Rushdie's death for publishing a novel. Those people are brainwashed. Aloimeh appears brainwashed to me. It's just pointless discussing such issues with people who are so narrow-minded that they can't even see the extent to which their minds have been closed by their beliefs.
I did at one point keep an open mind regarding religion, and being in a Catholic school meant that I was exposed to the Christian faith on a daily basis. After a while, though, I decided that none of it made sense to me and therefore chose atheism.