European Media will keep criticizing his intentions about NATO and about making every country pay for any help. I doubt their "leaders" will love it.
Retired British Foreign Office diplomat Jonathan Clarke:
Trump’s policy critics were likely to argue that keeping major US forces in Europe was essential to America’s foreign policy agenda in the region, Clarke suggested.
Clarke maintained that for many years European leaders had quietly taken advantage of this rationale to reject repeated US requests that they increase their own financial and military contributions to NATO.
US Defense, Foreign Policy Establishments to Resist Trump Policies
And Trump is totally right!
NATO allies must pay their bills!
It's not right for USA to pay for them!
Of course Europeans are not going to like Trump's speech....it goes without saying.