I would like to point out that this research didn`t find a causality. To do that one would have to get 2000 new borns, turn that gene on for half and off for the other half. Watch them for 50ish years and them come to that conclusion. So, what we have here is a correlation. It doesn`t exclude other types of root causes like: you will very likely have political views similar to your parent`s. Of course this is not the issue here, but unless a causality is determined the research didn`t rule the rest out.