What was the meaning of Out from the marsh, from the foot to misty Hills and bogs, bearing God's hatred Grendel came, hoping to kill

You want us to interpret those lines?

If so, basically, what those lines mean is that Grendel the monster left his dwelling and came to kill Hrothgar's men. He hates people because they get to be happy and loved, when he is hideous and alone and full of hatred for mankind.