Who's "they"? In any case, you cannot raise tariffs above the WTO agreed rates which are legally binding, you can only lower them and you have to do that for everybody, you cannot lower them for specific countries. This is why the EU could not offer lower tariffs to the UK without there being a deal, even if they wanted to.
Here. Do your own homework next time ;-)
I'm sure they appreciate Tory MP's tearing up press releases from the Germn boss of Airbus while spurting anti-German WW2 rhetoric, or Jeremy Hunt comparing the EU to a Soviet bloc, but hey, you pick and choose what's offensive.