> He caused a MAJOR issue for Greece

That link goes to the Greece financial crisis which, according to the Wikipedia page, started in 2009. Varoufakis was elected minister of finance in early 2015 and resigned only half a year later. From the outside, it seems impossible that his half year miniterial tenure could have caused a crisis half a decade earlier. At the time, Greece had already defaulted twice on their loans and were about to do it a third time.