“No weapon forged against you will prevail & you will refute every tongue that accuses you. This is the heritage of the servants of the Lord, and their vindication from Me,” declares the Lord. Isaiah 54:17 NIV

This doesn’t say no one and no thing will ever come against you. This says weapons will form & people will talk. But God is your defense. He prevents the weapons from prevailing & He vindicates you, because you are His.