That's why he says at least the leaders, it's about the consciousness expansion and feeling connected and being able to look at your own actions without the usual personal bias.
And not at a moment they have to make important decisions. A president in a bad trip that orders a nuclear strike shouldn't be taken seriously off course. But as the video shows the most common effect of a normal dose of LSD does the opposite of making people wanting to fight. I think it would turn out as a great succes when to confronting armies would be given LSD, I wouldn't be surprised if they choose not to fight and let the warmongers sort it out themselves.
And the dose is important, to much and things can get easily out of control.