After studying a lot of history I have a lot of faith that as with previous wannabe empires Afghanistan will stop America from progressing in its bid for world domination, I know what you mean though, the racist, hate-mongering shit heads around the place can be distressing at times and it does worry me the kind of damage they can do locally.
Afghanistan is an army sink. It eats empires for breakfast.
That's not to say WW3 isn't coming. I just don't think it's along the "Path to Persia." When it starts, it will likely come from a completely unexpected direction, that, seen through the lens of history, will seem to have been inevitable.
In other words, we're going to get blindsided.