No, MasterWu.
Firstly, on-line dictionaries are really crap. I have a 2-volume OED, and the depth of definition, with examples of first or early use of words, is far greater than on-line dictionaries. Entries in my 2-volume dictionary will run to a page or more - sometimes, in small print. The on-line version: it'll be an approximate synonym.
There's no comparison. I'll be honest, it drives me a bit mad when my children use an on-line dictionary rather than my copy of the OED, leading me to wimble on about the 'false-promise of the educative potential of the internet'.
The copy of the OED I used at university was multi-volumed and heftier still.
Next point: People spend a lot of time - and words - analysing the changing complexities of racism, discrimination and exclusion in changing societies. The people that undertake this analysis tend to spend a long time learning the tools that will best equip them to make this analysis, in the desire that the subsequent analysis is rigorous and has a strong truth-claim.
Given the precision, the substantiation, the subtle depth of argumentation (in order to achieve precision, clarity, non-miscommunication and communicability) tends to be book-length, it's hardly likely that all of that will make it's way into the one-line, approximate synonym 'definition' offered by an on-line dictionary.
It's not some sort of '101'. It's the opposite.
It's not a completely drawn-out of the air opinion. It's the opposite.
I'm finding the whole attempt to put serious, considered research on a par with the opinions of Jo from Wisconsin really, really wearing. I, for one, haven't had enough of experts.