I think you're picking a quote that is little known. I'd love to see a reference on that. I also suspect that without context to that claim we don't know what they mean... do they mean that adding more energy into the system (global warming) they could turn off the thermo haline current and therefore plunge Eurasia into a new ice age - which is true.
If it is a bona fide claim by a recognized body, then the discussion about it will be vigorous and either be consistent with other findings or challenge other findings and either supersede them or be consigned to the junkyard. That is the nature of peer review.... that is getting the story straight - and it always takes time. These are not proclamations but processes.