"Another point of contention is that word "incarnation". It is nowhere to be found in the Scriptures but is used to suggest Jesus was God 'clothed in flesh'. This too clashes with Scripture which teaches he "came down from heaven", and that he sacrificed his "flesh". "
Not sure if that site uses "incarnate". I used it but certainly not to suggest Jesus was God clothed in flesh.
Where I come from it is well known that there is the possibility for certain relatively high entities to periodically be coated in flesh as a human for the purposes of attempting yet another rescue of general Mankind and showing certain individuals a "personal" way.
It is strange to me to see all the back and forth and arguing about how, why and whether the high entity "Jesus" pre-existed before being born as Jesus the man.
Also further complicated by those that insist Jesus is God.