rock to its foundations

rock/shake something to its foundations

  also rock/shake the foundations of something
to damage or change an organization or a person's beliefs very much Allegations of scandal and abuse have rocked the party to its foundations. The ideas seemed to make sense, but shook the foundations of her own Christian beliefs.
See also: foundation, rock
References in periodicals archive ?
The East End of Glasgow will rock to its foundations and, once again, I stress Celtic cannot leave the backdoor open.
As night fell, the Manic Street Preachers played new material that will shake British rock to its foundations.