I found this reference on a weblog run by Christians who happen to be very conservative.
Other than that, most Christian comments I've seen echo those of the "conservative Christian" commentators at Washington Post, Slate, etc.
I have another shocking secret about Alexander for those conservative Christians: he was a pagan!!!
Like a warlord who wants to rule the world is a great Christian model to begin with.
I think maybe that's why Christians have been so silent on the subject.
A film that suggested that, say, Marcus Aurelius was a drunk and a womanizer (as far as I know, he was neither) shouldn't bother Christians either.