I'm not sure that you mean by "substantiate", but especially right-wing and Christian parties here in the Netherlands tend to look to the US as an example and are uncompromisingly loyal to them. For example, privatizing utilities, support in their wars, sharing financial and passenger data for "anti-terrorism", forbidding liquids in airplanes (and installing body scanners), cracking down on downloading, keeping the ACTA secret, insisting on buying USA warplanes, and so on. It's the same for a few other EU countries.

It might go to far to assume they will emulate SOPA and NDAA immediately, but I wouldn't be surprised if they tried.