"By your philosophy, God has to be a liar. Scripture cannot be in conflict with itself any other way."
No, by YOUR teaching.
Jesus said that Leviticus and Deuteronomy were wrong about divorce and food rules.
Scripture conflicts with Scripture right there, in the mouth of Jesus.
Repeating over and over that Scripture "can't" conflict is not very convincing in response to two examples where it clearly DOES conflict.
What resolution, then?
Obvious: Jesus was God. So he has the highest authority.
Interpret everything else in Scripture through Jesus.
No he didn't. Here's what he said in Matthew 15:
10 When He had called the multitude to Himself, He said to them, “Hear and understand: 11 Not what goes into the mouth defiles a man; but what comes out of the mouth, this defiles a man.”
He isn't challenging Scripture. He is simply saying that the food isn't the problem, but the tongues of men.
In fact, he stated earlier in Matthew 5:
17 Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill.
Does this sound like he is contradicting Scripture? I think not! Your assertion is plain wrong.