So, you claim. The Arabic word for god, i.e. Allah, was in use well before the Muslims came along. But if you want to believe that Arabic speaking Protestants worship a false diety because they use the word "Allah" in their native tongue, that's your prerogative.
But then maybe you reject the scriptures that Jewish and Christian believers revere as the word of God.
But then, maybe I don't. But what's that have to do with Arabic speaking Protestants using the word Allah?
Who is Jesus Christ? Perhaps if you will answer that we can resolve the issue.
My answer would have no bearing on the issue of Arabic speaking Protestants using the word Allah.
who do you say that He is?
Who is Mohammed?
Who do you say that he is?