before anything else, this guy is just another guru spreading his opinion. If you google abit, you fill find a video just as convincing on why you should do the exact opposite 
Why do you think so many people buy the crap out of 2%TER actively managed funds?
I picked a 20% allocation to VWO because I feel its a good amount. you are free to lock a xx% share in your IPS. Which of those is better? no idea. the latter is clearly inferior in diversification.
P/E-rations do have some story to tell, @Julianek is your specialist here^^ however there is limits to that. for example this plot shows you that PE / PV - wise you’d have to put your money into hungary, russio, italy, poland, brazil etc, not china (plot from 2015)…