Dumbledore is evil. Or at the very least on the highway to hell with a lot of good intentions paved in. But assuming he's just flat out evil and really did succeed in taking over the Wizarding World by making everyone think he's actually good... let's take that to a logical conclusion, shall we?
Harry Potter was dragged in to the room, unable to move for having already been put under petrificus totalis. Finally he and the two dragging him stopped, and the propped him upright. To Harry's growing sense of defiant resignation, Voldemort stood in front of him, twirling his Holly and Pheonix feather wand in his fingers.
"Leave us." Voldemort hissed.
The two Death Eaters bowed and scrapped repeatedly, not daring to turn around while exiting and closing the door. With a simple wave of his hand, Voldemort sealed the room of sight and sound whilst simultaneously releasing Harry from his binding.
Now able to move, Harry stretched a little bit, but keeping a wary eye on his captor as the Dark Lord continued to watch him impassively, still twirling his wand as if he hadn't a care in the world.
"So what's it going to be? Going to torture me? Insult me? Cast Crucio on me with my own wand?" Harry spat, growing tired of waiting in the silence.
Voldemort snorted, "Hardly. This is just the first time you and I have been alone and unobservable since that night 15 years ago. It's been a while Harry."
Harry looked at Voldemort, nonplussed. For some strange reason, the hissing sound that accompanied Voldemort's voice when he'd talked at any other time, including to the two Death Eaters earlier, had completely disappeared.
Voldemort for his part, nodded in understanding. "I'm sure there is a great deal you don't know, or at least don't remember. Allow me the chance to explain and all will be revealed."
With another wave of the hand, two plush arm chairs appeared.
"Please, sit." Voldemort said, doing the same. Harry, just stood there for a moment, eyes flicking to the wand still twirling in Voldemort's fingers before sitting down gingerly, tense and coiled as if like a spring.
It was at this point that the author grew tired of writing out events and decided to simply state this is where Harry and Voldemort have a conversation in which Voldemort reveals Dumbledore's evilness, and Voldemort's fear of him and desire to be safe and rid of him, hence his name 'flight from death', a touch of irony, but not in the way one would expect.
In truth Voldemort had been playing the 'dark' against the light to simply get rid of Dumbledore, and once he's gone and his machinations cleaned up from the Ministry, Voldemort and the key members of the Wizengamot would form a power block to ensure people like Dumbledore couldn't get power ever again, and then Voldemort would stage his own death and fade into obscurity. It's at this point Voldemort reveals how his face is just a mask, both figuratively and literally, in that he shows what he really looks like as Tom Riddle, and that he still goes by that name and will gladly do so again since not many at all would know who Tom Riddle is by that point.
Then the bombshell drops when Voldemort reveals that Harry's parents were unmarked Death Eaters. Unfortunately Sirius and Remus were too much in Dumbledore's pocket to be persuaded to the truth. Regardless, Voldemort hadn't entered the Potters house to kill him, he'd already been there numerous times! Turns out everything that happened before on that night had been a ruse and things went down far differently. After all, who could have known and spread word about what 'happened' there other than Dumbledore?
As it turned out, Dumbledore had caught on to the deception by the Potters and had ended up laying a trap for Voldemort when he showed up. The blast leveled the house, though Harry miraculously survived. And the rest, as we know, is history.
Now? Now Harry gets to decide if he joins the charade as being 'dark'. After all, if Dumbledore is the 'light', what exactly is the 'dark' anyway?