Wikipedia – A small study in bias

I did some minor research recently, I like to make sure things I say are correct.  I was mentioning Moa and stating how his labelling of red and black is the same as the establishment labels today of gay/trans/right etc.

I found a Wikipedia article on the 5 black (bad) categories.  I normally avoid Wikipedia because they can be biased and will often inject some level of propaganda and this will often make the information incorrect.  I thought the historical stuff was safe from this, apparently it is not.

On the article in question I noticed modern wording.  It had a link for this modern working and I clicked it to find a modern explanation of the modern word and nothing to do within the context of Mao.

Not wanting to assume I checked a few other sites to find Wikipedia seem to have changed the word.  I am sure this was no accident.