Yeah, in Europe there are also right wing parties and Nazis. Not sure how this would prove that Europe’s left wing parties are not to the left of american Democrats, although very small. The existing of more than 2 parties and the historical political tradition makes this quite a natural fact to be honest. Besides, a lot of left politics is anti-imperialist and it’s hard to be left when you are governing an hegemonic country like US…
All in all though I would agree that the mainstream socdem parties in Europe are very similar to the Dems, also because of 30 years of influence, policies, pushes for “two party system to get stability” and so on.