That would be ironic indeed, but of course that's pure trash history: Germany has consistently been getting around 40% of it's gas imports from Russia/USSR since 1985, so about 25 years before they started turning of nuclear.

You can also look at this plot of fossil fuel as fraction of all consumption and try to point out the point there there's a jump from nuclear switching off: https://ourworldindata.org/grapher/fossil-fuels-share-energy...