If you mix a spiritual body with a flesh body it is a perversion of what is natural and the results are not the same as mixing flesh with flesh.
I'm not taking a side in this comment. But I want to point something out.Scripture does not actually say that. In principle, Scripture disagrees with you in the person of Jesus Christ, Who is both fully flesh and fully spirit.![]()
The idea of "mixing" (keyword) spiritual with flesh into one person is Chimerism, which may characterize the Nephilim. But it certainly does not describe Jesus.
Doctrinally, Chimarism is a Christological heresy which argues that parts of Jesus were human while other parts were not human.” (i.e. Jesus' 2 natures are a divisible combination). This is a heresy, and we ought not to describe Christ this way. So the 2 natures of Christ are not comparable to the angel view of the Nephilim.