Have to agree with this. You should always go as close to the source as possible. I don’t expect UK papers to report on the US correctly on many things, so if I’m interested in a US story, I’ll cross-reference with a US source (or more than one, depending on interest) to see if it checks out. Same with US media reporting on UK stories, which again sometimes get the basics incorrect, and need to be cross-referenced with UK sources.
The right seem to have a problem with this methodology in general. If you want to gauge the response to a “terror act” in Europe, you need to see what the broad media report from the affected country is. The US media seems to paint the UK as being in crisis every time something happens here, but the reality is most people are just carrying on pretty much as normal.