OP you don't need to apologize for the source, there is nothing wrong with drawing from a variety of sources even when we don't agree with all of what they say. What matters most is the quality of the analysis and the factual reliability of the information.
To the downvoters: chill. Yes the title is hyperbolic, we know, but the article itself is well sourced and factual. This story may only be about one particular brigade for now but it's reflective of a broader dynamic and indicative of where this conflict is heading.