It literally is that easy. The edit history is public
precisely so you can identify when the hasbara and wumao goons plaster up their propaganda. If they make a citation that comes from a sketchy or unsubstantiated source, you can contest it and have the misinformation removed. This happens pretty often with tabloid-aligned cable outlets, including Rupert Murdoch's
Fox network. Obviously it's less of a problem for outlets with fewer retractions, such as Reuters and AP. If that's "highly biased" then Fox needs to reflect on their own opportunism and journalistic integrity.
Like I said originally - Wikipedia is an annotated source aggregator. If it so happens that the liberal-aligned sources are the only ones reporting on war or hate crimes, then you'll have to excuse the moderators for ignoring the protests of Fox News Australia and Times of Israel. Your reputation matters, in journalism.