I have definelty seen it implied that Ole is linked with Bernagchen, as in he is/is and emanation of him...so it is out there somewhere.
Just doing a bit more research on this on the internet this morning – it’s not so black and white. I think Diamondway uses the term “Mahakala” to refer to any type of Dharma Protector. Nydahl clearly identifies as a Dharma Protector (as we read in the Nydahl student Burkhar Scherer’s article which was the topic for another thread on DW). He sees himself as performing the activity of a Dharma Protector (which I suppose makes him some sort of emanation in his own eyes) in respect of the Karma Kagyu lineage. This is not something I have ever heard claimed by any other teacher in any other lineage. It adds a useful supernatural element to Nydahl’s persona, though.