I’m suggesting that when you say Russian red lines have been crossed without consequences, you need to provide primary sources from Russia regarding what Russian red lines are. I see this is a very difficult concept for you to grasp.
Of course, one can challenge sources (of any type) but that does usully require some type of argument for why the source is incorrect, and not just because you don’t like it.
The source is incorrect because the red lines claimed in the source haven’t actually been articulated by Russia, and none of the links in your source actually trace back to statements from Russia. So, claiming Russian red lines have been crossed when there is zero actual evidence these were Russian red lines is nonsensical.