It’s unclear were exactly France is on this, though I agree that Italy under the current far-right government is unlikelly to recognize Palestine.
I’m mostly thinking about the Financial stuff: none of the so called PIIGS forgot how they and their populations were sacrificed to save German banks and a “Let’s fuck Germany” posture wouldn’t at all be a hard sell in those countries plus I very much doubt that generally not doing what’s good for Germany would be bad for those countries since they’re almost opposite to Germany in the forms by which their economies can benefit from the Euro - they would actually grow more in an Euro without Germany.
I’m also not so sure that a German exit would end up being bad for the rest of the EU, especially for the less export oriented and more peripheral countries like Spain - certainly an Euro minus Germany would actually be better for everybody else but Germany (as Germany pushes up the value of the Euro, making other Euro nations less competitive and partly explaining their anemic growth and lack of funds to restructure their Economies, which is the other big reason for their anemic growth) though granted it depends on how important are exports to Germany in each economy, though on non-Euro EU matters you might be right. In summary and as I said before, almost nobody else but Germany benefits from Germany’s Euro membership and the kind of nations that would be least affected by a Deutschexit are the ones who have no borders with Germany, a group that includes Spain, Ireland and Norway (though the latter is not an EU member and hence has no vote or veto so doesn’t really apply for the scenario we are discussing).