it takes millions of dollars in advertising/campaigning to teach the american public about anything (any public in the world really. hell just the "wear your seatbelt" campaigns you see cost ridiculous amounts of money
taking your president to court for ANYTHING, whether murder, genocide, war crimes etc would actually be a really effective way to increase the publics awareness about their country. a bargain in terms of political eduaction, really.
besides, whatever the cost of taking your president to court, it pales in comparison to the alternative - which is to allow them to keep spending hundreds of billions overseas on needless wars