"I think his attitude that he'd answered the question indicated that he had decided that "The Father is the Son.""
Oh, I sincerely doubt that FL, a profoundly Orthodox person, simplifies the Trinity in so modern, innovative and Protestant a fashion. In all honesty, since it is mostly the preaching of Protestants which the Mohammedans these days refer to when they speak of Christian beliefs, its little wonder they persist in their erroneus belief that we all are tritheists.
That was his answer, not mine. Ask him.
And you are correct, of course. These people cannot understand the most straightforward lessons in Scripture. There just comes that point when one realizes the time has come to shake the dust off one's sandals.