What a bunch of fucking simpleton degenerates you people are to read something like this and assume confidently that you immediately know the answer. The world is complicated and we are all more biased than we admit to ourselves--try to enlighten yourself.
Let see:
This research comes from the netherlands, a country that in the last decade has become known for the prevalence of white-supremacist sentiments among its population, a product of the high ratio of non-white immigrants/to native dutch citizens. Thus, the research was conducted on a population of people that are atypically predisposed towards identifying their ingroup along racial lines. If they were not so, it is very possible that results of this study would have been different--See
http://www.pnas.org/content/98/26/15387.short for an explanation.
More importantly, two facts are already known: 1)people have racist tendencies 2)people's behavior and 'sentiments' come from the brain. So, to find something correlating the two is unimpressive. Of course, some neonazis have gone and tried to say that this proves that racism is hardwired into the brain and into our perception of ingroups and outgroups. But that is not at all proven by the study.
Most importantly, despite the fact that racism is probly hardwired to some degree--albeit likely in a way that is less profound or binding than the degenerates would have you believe--the point is that most enlightened people would like to overcome racism. We live in an increasingly globalized world of scarce resources, where the large majority of people of all ethnicities stand to gain more (in wealth, security, technology etc.) from cooperation and friendly competition than they do from the destructive competition of racism.
Personally though, sometimes I really just think that the degenerate fuckwad neanderthals who can't overcome their base human urges (ie racists) should be treated like the animals they are and stripped of their membership in society. But that would be unproductive, like racism.
Seriously though:
http://www.pnas.org/content/98/26/15387.short use your fucking head. For once.