Mary is referred to as Theokos.
Of course this means " mother of God".
So we have to accept that "theos, in Christian circles, means God.
Why?
Because WE do not decide the Christian faith. It was decided for us by the Apostles and those who came after them.
Christianity affirms that there are 3 persons in 1 God.
You must believe this to consider yourself a Christian.
Those who do not believe this cannot consider themselves Christian.
Wondering,
Throughout Christianity, this has been a battle ground and a decider of what makes one a biblical Christian. To believe in Jesus as in John 3:16 (ESV), caused us to ask, 'Which Jesus?' The answer to that question divides orthodoxy from unorthodox belief.
If Jesus is not God and the second person of the Trinity, my understanding is that he is another jesus and not the one who died for our sins on the cross.
This 'other' Jesus was being promoted in the early church. Paul knew of it when he wrote to the Corinthians a second time: 'For if someone comes to you and preaches a Jesus other than the Jesus we preached, or if you receive a different spirit from the Spirit you received, or a different gospel from the one you accepted, you put up with it easily enough' (2 Cor 11:4 ESV).
That's why pursuit of biblical doctrine is so important in the precarious age in which we live. That's why we need more Bereans in the church (Acts 17:11 ESV).
Oz