Saying it doesn't make it so.
Jn 6:44 stands sir
Matthew 23:37 - Jesus came to Israel, calling out to her for three years. Israel refused to be gathered by God.
Hosea 3:1 - God loved the children of Israel. But they went after other gods instead.
Isaiah 30:15 - God wanted to save Israel through returning and rest, and strength through quietness, and confidence. They didn't want it.
Luke 19:41-42 - Again, Christ had come to Israel for three years, and they rejected their Messiah.
They were past the point John 6:44 describes. God came to Israel, and called out to them. They rejected his calling.
Well if you agree with it, whats the contention ? I see no contention, man is spiritually dead to God.
The contention is that man, spiritually dead as he is, CAN (as opposed to your "cannot") respond to God's calling.