I was born and raised in the truth so I understand and agree with the meanings of the words you have highlighted except the (son of man).
This to me undoubtedly means (someone whose physical father is a human).
Going back to the scriptures, when I read them with an open mind they seem to suggest to me, that the writers were of the opinion that the liberator will be returning to us on earth.
For example (that he may >>>send forth<<< the Christ appointed for YOU whom heaven, indeed, must hold within itself >>>until <<<the times of restoration) and
(go subduing in the midst of your enemies).
Where will Jesus’ enemies be during the times of restoration?
I know you can explain all this but things fit far better if you imagine the idea of Jesus returning to earth as the son of man.
Obviously I have not based my opinions on just these scriptures alone, there are many more like this.
John 16:13 However, when that one arrives, the spirit of the truth <not the holy spirit>, he will guide YOU into all the truth, for he will not speak of his own impulse, but what things he hears he will speak, and he will declare to YOU < the anointed> the things coming.
Please think seriously about what this scripture is saying, do’s it sound like the Holy Spirit is being described here? And also ask your self; is it like Jesus to intentionally speak in such a confusing way without the need? Also if he knew that his use of the word HE here would be used as the basis for belief in the Holy ghost part of the trinity, he would have avoided giving Satan some very useful ammo.