I guess my question is really what the effect of such laws was? Obviously there has been general prosperity and peace between the Western European countries but this may have been due to other reasons.

There doesn’t seem to be much more resilience in the population to the kind rhetoric we’ve seen recently in America. Indeed, there seem to be many parallels. Maybe the laws helped but we see less difference now as Europe after the war started “further behind”?

It’s certainly true that holocaust denial is illegal in Germany. It isn’t, for example, illegal in the U.K. (there was a libel case lost by David Irving against someone who called him a Holocaust denier where he tried to prove he was a legitimate historian however), and there are surveys showing that some percentage of the population don’t really believe it (but maybe this is the fact that for even seemingly trivial survey questions, some proportion of people give the wrong answer). I suppose here I would just point out that Europe is a big place.