I see this as being a human problem, not something consigned soley to "right-wingers." That's absurd and self-refuting concept. This whole social "experiment" is suspect of the very thing it claims against others -- blinded by bias.
That's more a problem of the way the experiment is reported than the experiment itself. If you read the quotes Modulous posted, the experimenters were quite explicit that no definitive conclusions can be drawn about whether this effect is different across the political spectrum.
Whenever we talk about differences between 'conservatives and liberals' or 'left and right', I think it's important to remember that the package of ideas lumped under these headings are not in any sense universal. To take some examples that spring to mind that are usually considered right/left issues in the US, it was the right-wing conservative government here in the Czech Republic that made this the first country in the old Eastern bloc to legalise gay marriage, and it was the left-wing Sandinista administration in Nicaragua that outlawed abortion, to the cheers of their supporters.