She's a fiction writer. I just perused over one of her book reviews with excerpts, and she's not even a good writer. In fact her style of speech is... straightforward... in the fashion of a person who isn't intellectually competitive. That being said, there's probably two things going on here. I believe firstly that she probably, legitimately, believes her theories on the surface, but really is feeding them out to everyone else to perpetuate her relevancy.
My second thought is that she is like so many others, being fed ideas by people more intelligent than she is, and being allowed to run about at the mouth, because whether it be solid or not, viable or not, anything that isn't contradictory to the cause is essentially white noise to obscure an inconvenient truth. Which in this case I believe the Americans are responsible for Breitbart's death.