US mainstream news outlets like CBS News with actual reporters on the ground at the time: https://www.cbsnews.com/news/there-was-no-tiananmen-square-massacre/
Classified US communications with assets on the ground: https://wikileaks.org/plusd/cables/89BEIJING18828_a.html
Image Analysis
When I see things like that I always like to see what kind of website this is https://en.wikipedia.org/wiki/Al_Mayadeen
It is argumentum ad hominem. Imo, doesn't matter what site is it. If the site has a bad reputation just check sources twice but do not reject the article just because the site. That's how I see it.
Sorry, if you post Nazi propaganda and Holocaust denialism, you lose all credibility as a source.
Nazis are more than welcome to try to argue that they are a decent source, but anyone with a brain is going to discount the site and stories when you see the dreck they post.