Is the same oneness as John 17: 21 That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
Wrong!!! Biblehub says they are exactly the same:
Mark 10:8 https://biblehub.com/mark/10-8.htm
one: Strong’s Greek 1520: One. (including the neuter Hen); a primary numeral; one.
John 17:21 https://biblehub.com/john/17-21.htm
one: (including the neuter Hen); a primary numeral; one.
Give it up Elsie .... ‘you can dish it out .... but you can’t take it.’
Maybe you should take Christ’s advice:
Mark 7:5 5 Thou hypocrite, first cast out the beam out of thine own eye; and then shalt thou see clearly to cast out the mote out of thy brother’s eye.