For either, if the papers don't stand up to peer review and meta-analysis then yes, we should ignore them. Don't often see papers from think tanks engaging in actual science though....
We should ignore fact-free white paper from left-leaning think tanks, as well. We should accept scientific studies with a clear protocol, regardless of the institution. That is the bare minimum and then, those studies can be refuted or not depending on several factors.
If your point is that no academic study can be trusted because academics are raging socialists, then I don’t know what to tell you. We clearly do not live in the same reality.
If political bias means we shouldn’t look at scholarship, we should also ignore papers from uniformly left-leaning university academics, correct?