My question is, why don't the liberal establishment and the media (but I'm being redundant) take this kind of thing seriously
I guess there are two broad possibilities.
1. There is a vast (ie., global) media conspiracy of all but one media outlet to not report violent Iranian attitudes towards Israel.
2. There is actually nothing worth taking seriously and there is a small conspiracy of one 'news' agency (WND) to make out that there is something to take seriously.
One of the options has evidence to support it (ie., WND are known cranks), the other is evidence free.
I wonder which one should be thought of as the preferred hypothesis?