so read the report itself.
I gave you the link to the report-see it? It's not uncommon to use opinions -as long as the source material is there.
if you disagree, then refute it
Here is the link directly to the report : https://www.us-cert.gov/sites/default/files/publications/JAR_16-20296A_GRIZZLY%20STEPPE-2016-1229.pdf