Further speculation:

I think Varoufakis does not oppose the integration plan. He is just against sacrificing the greeks to achieve that goal. In that context it would be plausible for Schäuble to say that. Schäuble could be trying to convince Varoufakis that it is the only/best way to break the french. Assuming the french already know this it changes nothing if anyone knows he said that. What is weird to me is that Varoufakis seems to be in the know about a lot of things and if Schäuble said that to him it means he respects him. On the other hand he has planns to spear head a revolution against the monetary powers that be. Also i think this plan b is not a surprise at all to anyone, given that Varoufakis was very open about it. People involved knew that a national currency plan b would involve a coup, and in his blog he talked about the cryptocurrency and the whole thing ages ago.

I agree with you. I guess only time will tell. But just to speculate maybe Schäuble is really arrogant and he knows no one would believe Varoufakis. Maybe he said that in a very diplomatic way and Varoufakis was quoting what he believe the minister said. It is also naive to think that the french would be completly in the dark about german intentions. That's why Hollande is completly against the Grexit. But you are right its implausible, and even if true Varoufakis lost his oportunity. I do believe that there are some forces looking forward to implement a fiscal union and that they are unstoppable. I only wish they do not seek to prostrate europe to achieve their goal.

You're making the assumption that Schäuble is a reasonable man, which he's proven amply not to be.

Character assassination won't make you look any better.

Your point is: The things Varoufakis claims Schäuble said and did would not have been said or done by a reasonable person.

To that i am pointing out that Schäuble has in the past said and done many things that were entirely unreasonable, even if some may have been meant well.