But I wonder if the IMF are in fact perfectly happy with a divided Europe pockmarked by fascist nationalist governments. There certainly seems to be no interest in preventing that outcome.

Instead of a two-speed Europe you then have a half-speed Europe, where the various countries eye each other suspiciously and are reliably unable to agree on anything that doesn't involve bullying or exploiting a weaker partner.

If you're a neoliberal, what's not to like?