I'm not sure he actually wants to destroy the world, even though he has been quoted as saying that if Russia is annihilated (not sure where he ever got that notion from - and no one wants such) then the world can go to Hell, or something to that effect. And as to which, he is a truly delusional and dangerous individual, just as they are who are quite happy to see the 'End is Nigh' - as long as it fulfils their cherished predictions from their cherished religious beliefs. Much the same really.
I'm old enough not to be that bothered - what with all the washing, cooking, walking to the shops ...