With respect to the article in the Atlantic, if Julian Assange contacted Don Jr, so what? I have Nigerian Princes and government officials contact me all the time.
Assange initiated the contact. This was an Assange agenda being pursued, not a Trump agenda.
I agree with this, unless there are additional relevations, this by itself is not damning. However, you have to admit that Assange actions put his neutrality out of question. You can clearly attribute agenda to his leaks (anti-US), and he believed that Trump would further that agenda.