Using the S&P500/MSCI World Index in these charts seems very disingenuous - they aren't supporting his argument, they just give off the sense of credibility if

Using the S&P500/MSCI World Index in these charts seems very disingenuous - they aren't supporting his argument, they just give off the sense of credibility if you aren't paying attention. He's going (A) "here's a chart" >> (B) "and this is my argument". But B doesn't follow from A at all, it just creates the impression of being evidence-based.