Why David and Jesus (Son of David x2) say forsaken? Is it bcz of speaking of two Gods or a plural divided God?

Allegory

2009-11-12 12:37:39 UTC

References:

Psalms 22:1 (David)
My God, my God, why hast thou FORSAKEN me?

Matthew 27:46 (Jesus)
And about the ninth hour Jesus cried with a loud voice,
saying, Eli, Eli, lama sabachthani? that is to say,
My God, my God, why hast thou FORSAKEN me?

Matthew 1 & Luke 3 genealogies suggest Jesus
is the son of David by Solomon and/or by Nathan,
but Luke 3 goes back to God thru Nathan & Seth;
Yet Nathan tempted David to condemn himself,
but God neither tempts nor can be tempted;
Luke 3 God perhaps plural Elohyim of Gen 1.

Mention of "My God, my God" suggests
either two Gods or a plural and divided God.
Plural Psalms seems to have plural LORDs.
Mention of "loud" voice suggests a law voice.

Neither of My God, my God seem to be grace;
Grace says I will never leave nor ever forsake?

Deuteronomy 4:31 (a merciful God will not forsake)
(For the LORD thy God [is] a merciful God;) he will not forsake thee, neither destroy thee, nor forget the covenant of thy fathers which he sware unto them.

Deuteronomy 31:6 (that LORD will not fail nor forsake)
Be strong and of a good courage, fear not, nor be afraid of them: for the LORD thy God, he [it is] that doth go with thee; he will not fail thee, nor forsake thee.

Deuteronomy 31:8 (Spirit led by that LORD doesn't get forsaken)
And the LORD, he [it is] that doth go before thee; he will be with thee, he will not fail thee, neither forsake thee: fear not, neither be dismayed.

Hebrews 13:5 (remembrance of what one God said)
he hath said, I will never leave thee, nor forsake thee

So what's with David and Son of David saying forsaken?