That was true 15 years ago - especially with Merkel/Obama/Cameron - but a lot has changed since then.
The European right and American right essentially speak from the same ideology. As the Republicans have moved away from free markets, free trade and immigration. Trump, Farage, Weidel and Le Pen could all work happily in coalition together.
The European left has become so fractured that it's hard to make clear comparisons. Which German political party would Bernie Sanders want to join of SPD, Greens, or Die Linke? In the UK would he work with the SNP, Labour or Corbyn?