Not very widespread. You may not have a very long view on history. Take a look at my username (I'm "English" by the way). Just in case I need to spell it out: Gerdes ~= German.
Those two wars had very different reasons despite Germany being a participant in both of them. Russia (famous for not being Anglo) was a major player in those wars as well and we should not overlook Japan etc as well.
WW I is the more important because it destroys the power of the royal families that ruled the empires of Germany, Austria-Hungary, Russia, Turkey and China. By the end of WW II most royal families were reduced to figurehead status, except for the British and the ones that Britain tried to re-establish in the Middle East.
I don't know how widespread this view is.