The bible (not any man) commands Christians to sing. Those that follow the bible will sing and not change that command but accept it as it is.
Those that follow men will do as they please regardless of what the bible says.....and this is how you end up with thousands of religious groups that contradict each all over the place yet all claim to be "right".
(The corruption of men adding IM to their own worship took place many centuries before Campbell was even born)
I suggest the INSPIRED SONGS (PSALMS) of worship......God inspired them and your view contradicts what God inspired.....if it was GOOD enough and INSPIRED in the OT WORSHIP of GOD then it is FINE and acceptable in the worship of God to this very day.....I really don't care if your you reject the truth and are blind to the truth...maybe trust Jesus biblically and then your eyes will be opened to the truth instead of the doctrines and traditions of men!