Horton asserts the assumption that, "Now a flesh and bone body must necessarily still have quite a bit of blood in it."
Jesus said flesh and bone. The Power of the Creator is such that HE can make any type of body for resurrection that HE chooses to make. What will be the next bold assertion, that the resurrected Christ MUST have Oxygen? Must have food? The root of heresy in Preterism is assumptions, and this assumption of necessary blood is in the same vein of arrogant assumption over what God can do.
You didn’t read the article...
You are basing an entire doctrine upon the omission of the word “blood” from an idiomatic phrase “flesh and blood” which does not mean the same thing, in Biblical context, as “flesh and bones”.
John wrote that we don’t know now what we shall become, but when we see Him, we shall know (what types of bodies we will have in the resurrection). This means John believed Christ was in the same fleshly body He had on the Cross.
The same human flesh body that went up to Heaven.
Jesus only changed into His glorified body AFTER the ascension. And so John writes that “we have not seen Him” in that glorified state, but we will know when we do see Him, what we shall be changed into.
There was nothing spiritual or immortal or immaterial about Jesus’s appearance after He was resurrected, though this did not preclude Him from performing the same miracles He did before the Cross.
Elijah went up to Heaven in a normal body, just as Jesus ascended to Heaven in a normal body of flesh.
Lazarus was raised into his regular body and ate food with Jesus just as Jesus was raised in His regular body and ate food.