Why have local laws in that case? Better we all just adopt American laws to not have to fear the Americans getting pissy when they diverge...
Protectionism works both ways - as it should. So if Sweden disadvantages American companies in the name of protecting domestic companies like Klarna, then it's completely expected that the US will do the same thing against Swedish companies to protect their domestic companies.
All of Europe can't even push back a broken husk of Russia.
Of course if the Russians make it to the German border AfD will welcome them with open arms and the rest of the German public will be too busy debating if raising the debt limit to dig their own graves is acceptable if it means limiting pensions, and if so, what are acceptable working hours for grave diggers, pension plans for grave diggers, and whom should negotiate on behalf of the grave diggers.
Considering Klarna essentially boils down to a lending service for people who want to buy stuff they aren't able to afford in the moment, I don't think this is the dunk you think it is.