I think heydarian saeed is treated somewhat unfairly. It is true that he sticks to his religious guns, but so do many Christians, and they are able to hold highly skilled jobs where their religion does not interfere with the job. The fact that he is a Muslim does not disqualify him any more than if he was Christian.
Many attempts have been made here to turn him into a hateful terrorist, and he has carefully avoided the traps. It may well be so that the Quran is full of hate and murder, but so is the Bible, and that does not turn all Christians into potential murderers, because they are cherry picking the bits they like, and ignoring the bad bits. So does heydarian saeed, and certainly makes him blind to the failings of his religion, but nothing else.
I don't think the rest of us (most or all) really feel badly towards him in the sense of any ill will. I think what you see happening with the more harshly worded criticisms etc. (including from me!) is that we are trying to get him to come to the point, i.e. trying to push him a bit towards facing up to honestly answering certain questions that get direct to the heart of his beliefs and his claims from the Koran ...
... it may be true that we have not made a great deal of progress considering how long this thread has been running, but the alternative is probably to just let heydarian (or anyone preaching their religion as fervently and as abundantly as he's been doing) dominate the entire thing by a huge mass of preaching from the Koran and about the Koran (i.e. claims of scientific miraculous revelation) without opposition from people here explaining why his beliefs cannot be believed as true.
And if we focus on (for example) accusations of "dishonesty", I think the point there is that in the end it really does come down to theists almost always being unwilling to think honestly for themselves about why they believe what they say about their faith, and on that simple basis simply not really being honest in the way they reply to what others here have said to them/him.
E.g., you see that all the time on atheists/sceptic call-in shows like Atheist Experience, where almost literally every theist caller simply refuses to present an honest argument and similarly refuses to give honest replies to questions when asked why they believe there is good evidence to support their belief in miracles etc.
As for religious people presenting a danger to others (and to themselves), unfortunately I do think that all religious people are potentially dangerous as a result of their faith beliefs. The reason is simple (and I think obvious), namely – there is actually no solid insurmountable barrier separating someone who at one time appears to everyone to be just a pretty laid-back Christian or Muslim with no dangerous thoughts/ideas/behaviour, and someone who very quickly then turns into what would widely be called a dangerous extremist … that distinction or separation is extremely fluid and a very easy line to cross. For example, if you look at all the major cases of Islamic terrorism in the UK (i.e. where many people have been murdered and where people have been imprisoned for life), in many if not almost all of the cases the Muslim attackers changed from being almost entirely benign and not especially devout, to quite suddenly becoming lethal extremist religious fanatics in a period of just a matter of months.
So in short, sadly I do think all religious belief can quite easily become very dangerous indeed (it's also anti educational of course, and highly divisive within society and within families etc. … so there's that sort of “danger” as well). Which is why I think we do need to oppose it wherever possible.