the reason is actually more sinister. their peace sign is really an antenna and this is how they gather information and are so smart but are so bad at life. they always do it while being photographed to remember where hot spots are, that's the one piece of information they always forget because they are bad at directions. it's also a way of isolating themselves from other races because they hate every other race except theres and this is why you always see them hanging amongst their own kind.
obviously i'm just kind heartedly slagging them off so don't take it too seriously. i have asian friends and i'm part asian....
...but i'm a self hating one...