Trying to get ahead of the alt-right hate machine here.
Apparently Ms. Thunberg improv’ed a speech and used Swedish figures of speech which turned out to sound more violent than they are (damn lucky she doesn’t have Finnish as her first language). Is my book suggestion ok?

Yesterday I said we must hold our leaders accountable and unfortunately said “put them against the wall”. That’s Swenglish: “att ställa någon mot väggen” (to put someone against the wall) means to hold someone accountable.
That’s what happens when you… (1/2)

— Greta Thunberg (@GretaThunberg) December 14, 2019

No problem, things regularly get lost in translation, especially direct such.
Fortunately, there are great books on the subject, check your local library and ask your friendly librarian for books on English idioms and figures of speech (Engelska idiom och talesättt).
*fistbumps*

— 🐄 Teo 🐄 (@Teukka72) December 14, 2019