Exactly! Looks like we need to have all the antitrust discussions again - how it's ok to have a monopoly but not ok to use that to grab market share on other markets, how monopoly power does not mean 100% market share etc. Too many are too young to remember from the MS antitrust days or maybe they have forgotten all that.
And if you think that it's wrong of EU to investigate an American company, think about it this way: with EU and US doing these investigations, we can have more faith in that all monopoly abusing companies will be investigated somewhere - even if their home country is turning a blind eye. This is good on both sides - it's not like this will really have a huge effect on Google anyway.