It’s a sobering reminder that all knowledge is biased, no matter where you get it. So far Wikipedia is at least a good list of sources, but if you are truly interested in a remotely controversial topic you need to go to those sources and judge for yourself the veracity of each.
I somewhat wish there were more publicized instances of manipulation, just to combat Wikipedia’s reputation of being trustworthy that probably makes many people blind to the above.
(This is not a statement on whether I support all policies of incumbent Israeli government, etc.)
Sure, it was never perfect and there still was bias, but today wikipedia is very unreliable for everything that somehow either touched the news cycle or is of interest of state actors. The latter often was restricted to specific languages, but today there are propaganda service provider that offer the whole package.
It's ridiculous (and exemplary) how bad wikipedia is, while still maintaining it's authoritative status.