Aside from the fact that, of course, he was not the mashiach, how did it ever get into their heads that mashiach = G-d??? (or “son of G-d??)
Xtians equate the two, and we certainly do not.
That’s quite a leap to make, and it’s a fundamental principle of their belief.
It should be pointed out that not all Christians believe in the Trinity. Unitarians and J Witnesses, for example, believe in a conception of God that is similar to our own.
The Wolf