a lot of the race based... "you will be a minority in your own nation in twenty years" type things, at least the ones people over here use on ocasion, mostly treat racaly mixed people as not-white in order to get there numbers, as people come into a new nation they usualy intermarry within two generations with the native population, the big race/natianality thing we have in the US is mexicans, hispanics make up the fastest growing minority and a lot of republicans use this as a way of getting votes, they say things like "there comeing here to hijack our culture" and there are a few places were this can be seen (only enough to be used as political fodder), but most people immigrateing assemelate right in. now it's not to say that we don't have an imigration problem, our borders are totaly out of control, but some people will use stuff like this to wip people up into a furvor of stupidity.