I didn't think that's what he was saying. I think he was saying if God wanted all men saved and didn't do it, then He wouldn't be very powerful etc.
Entertain that, perhaps for 2 moments: Can God save everybody if He wants to? Can He save someone who doesn't want to be saved?
If yes, why doesn't He?
If No, what prevents Him from being able to?
If God made man able to chose or reject salvation would that make Him a "big pathetic loser", or as you softened it, "not very powerful etc"? Hilston is well aware that that is what Open Theists believe.
--------
Can God save everybody if He wants to?
Yes.
Can He save someone who doesn't want to be saved?
Yes, although someone who didn't want to saved may not feel "saved" even if they were. But they could be spared from destruction if that's what we mean by saved.
Because that is not how He decided to make the world run. He could make these particular things happen easily, but instead He put the "choice" generally to us, under the circumstances and influences He made possible by His own will/choice. It is how He wanted to create us.
I don't see how that diminishes or threatens God in the slightest way, let alone makes Him a big pathetic not very powerful etc. loser. (makes me ill to even type that)