At the very onset, let me state that God is not weak, though some may claim and think it to be so. The ones at the foot of the Cross mocked him as a weak God, one who could save others but at the end could not save himself. For the Almighty (Elohim) God, this is a ridicule of immense proportion. He who fashioned the world with his Word and the one who controls all the elements of life, is now being told that He is weak, succumbing to death. But His state of weakness, He willingly chose, so that we may not be weak and enslaved under the bondage of sin. Jesus himself expressed that He willingly laid down His life so that He may take it back again (John 10:17) and Pilate had no power over Jesus, not to crucify Him nor to release Him, except that which was granted to him (John 19:10-11). So the reality is God is not weak.
However, for a moment, even if one was to think that God is weak, let us not fool ourselves into thinking that this weak God has to be subject to the power and strength of men. On the contrary, even the weakness of God is stronger than men (1 Corinthians 1:25). So if we were to take all the strength that men can muster and force that against God, it would be just a whiff of air against His weakest state.
The Truth is the Strongest of the strong chose to be weak, so that the strongholds of sin and its wages, a.k.a. death will no longer have its power over His people, whom He came to save (Matthew 1:21). Jesus is not a weak God and even when He chooses to be, He is stronger than the strongest of all men.