Jesus is God.
Mary is the mother of God.
There you go again.
How about using the same reasoning, we apply that to God the Father;
God is the Creator, the Great I AM (as the Creator identified Himself to Moses).
Mary is Mother of the Creator (who is God the Father) Mother of the Incarnate Christ, and Mother of the Holy Spirit too!
metmon is correct when she notes that within the Scripture, Mary is not given the title Mother of God, but instead is identified as mother of Jesus, who came to be also referred to in early Christian church tradition as the Incarnation of Christ.
Can you now see why the term Theotokos does not translate straight across as "mother of God", but rather more precisely as God Bearer?
In Greek language, Latin, and I believe Hebrew also, there are words which do translate as "mother", and were thus available for using as precise wording in regards to Mary's own role, if the early church were to have sought that to that terminology.
Yet they did not, in fact it must be recognized that the early church studiously avoided adoption of the EXACT term "Mother of God".
Those words were not chosen at what many today refer to as the first church Council, but instead a new term was coined, Theotkos, which translate to us as God Bearer, instead of coming up with Greek language term which used μητρὸς if the intent was to unreservedly identify Mary as quote-unqoute, Mother of God.
You did ask why so-called "Protestants" do not accept the identifying terminology which you and others have been obstinately demanding must be accepted.
Your having said that the Scripture was "crystal clear" on the subject was inaccurate, an as used was misleading. (I can only assume that was done on purpose).
If it were to have been such a simple matter, there would have been no real need for a few early Christians to have come up with the term Theotokos, doing so while also so utterly (figuratively) bashing Nestorius as they did (desiring to do so literally, physically also) causing one of the earliest significant splitting up of the Church.
May I ask;
I see I misspelled the word Theotokos, along with having allowed to slip by, some other minor poor editing.
Your syllogism is invalid. Undistributed middle.