Illusions

In the Beau Otto's presentation is a set of optical illusions designed by TED, the general theme of the presentation is that sight means almost nothing and that almost anything we see is an optical illusion. The presentation shows that colour is nothing but an illusion, therefore racism is not real? Therefore the Holocaust was REALLY not necessary, although the Jewish people being of the same skin colour i don't think it was because of the colour of their skin thus making this a bad example for this particular topic, should have went with segregation, or apartheid, but i just thought it was a little Cliche, in any case racism is just more of a status sort of thing rather than being better than someone in any form said racist sees fit. Another optical illusion is time as it is merely a fourth dimension, therefore making most things that people do rather pointless but then again who am i to judge, as i wasted most of the readers time with the holocaust and am doing it again by rambling, so i shall stop referring to the holocaust at this time, if it exists. A connection between me and the presentation is that i did not see any of the so called illusions, except for the bee one but really who didnt get that one, and therefore i can differentiate between reality and whatever that presentation was, therefore confirming my sanity, finally. In conclusion i would like to leave my reader with a riddle, if a tree falls in the woods and nobody seen it did it still fall, think about it.