If you want to make a point, you need to stop repeating yourself and actually respond with some substance. I just gave you a logical argument for why god wouldn't need to harden anyone's heart, were he omniscient... But then, maybe you just didn't understand; it was a pretty brief explanation (I was typing with my phone at the time). Here, let me elaborate that you might see my point.
The quote is what I originally said; this is what I meant:
God is an omniscient being here; He knows exactly what makes Pharaoh tick and what he has to do in order to get his people out of Egypt. If this is the case, then god could perform exactly what was needed to show his might and scare Pharaoh into letting his people go WITHOUT ANY NEED TO PERSONALLY CONTROL HIS HEART. However much it would take, we don't know. It could very well have taken until God killed his first born son, but God was apparently insecure enough in his plan that he took control of the Pharaoh's will anyway in order to make him more stubborn (or is that not what "hardened his heart" means?). If Pharaoh was truly intent on keeping a firm grip on the Hebrews, then God wouldn't have needed to intervene; Pharaoh would have gone the distance of his own volition. But it clearly says "God hardened Pharaoh's heart"; Not Pharaoh, God.
Coming away from my argument above, I'll address this issue separately.
I can very easily put myself in Pharaoh's shoes. It's the reason I'm able to take his side. Here, let me show you the story through Pharaoh's eyes:
An excerpt from Pharaoh's Diary:
First of Peret, Fourth day
A couple shepards came in from the country today to speak with me. They were Hebrew. I only know this because they gave the most absurd request that I had ever heard voiced within my halls.
"Let the Hebrew people go!" they said. The throne room went so silent, I could swear I heard a feather drop.
Then, laughter. At first, a couple chuckles, but it started catching and erupted into a roar. The stone walls reverberated the sound until it started to sting in my ears and I called for silence.
I asked them if they knew for what they were requesting. They said they did -well, the taller of the two did; the shorter seemed a mute. I asked them if they knew what kind of economical disaster would ensue were I to let such an uncountable work force simply walk away. They said they did. I started to get annoyed. Then I asked them, if they knew how devastating letting the Hebrew people go would be for Egypt, why they would ask it of me.
They said, "Because our god, Jehovah, will bring devastation upon you if you don't." I got angry.
I told them, in as calm a voice I could muster, that I had never heard of this god "Jehovah" and even if I did, he would have to be a god of extreme power to challenge one under the protection of all the great gods and goddesses of Egypt. Then the shorter one tried to impress me by changing his staff into a snake. I rolled my eyes and waved for my magicians to duplicate the act. They didn't have much more to say after that.
I sent them away with no repercussions; They were clearly deluded... or suffering from heat exhaustion.
People don't understand what it means to be Pharaoh. They think that I merely impose harsh laws and steal away their bread. But without the knowledge I have, this nation would fall into oblivion. If keeping Egypt afloat means enslaving thousands of innocent people, so be it. If it means letting them go and riding out the resulting economical catastrophe, so be it.
But I severely doubt it will ever come to that.