I don't have a problem with it, but it is the same semantics as what started this whole issue - though he does expand into a list of reasons (which isn't possible on twitter).
Now, granted the word can take on different levels of intensity depending on the circumstances in which it is used.
But it can and is used in general conversation and in that context it means nothing more than "I don't agree with you".
At least that is how the term bullshit is used here in Australia.
For what it's worth, I think most of the commentors are reading far too much into "this is an eye-bleeding script*.
I've seen people hurt by having what they've said called 'bullshit' by someone they respect; it's capable of emotional harm as well. That being said, let's not walk on eggshells.