I don't understand why anyone would care about the opinion about Christians when they have been practising idolatry and blasphemy for the best part of 2000 years.
They either did so knowingly and recklessly, or they were suffering from a learning disability making them unable to grasp the concept of idolatry.
Idolatry is the worship of anything that isn't God and Jesus, being a man, is not God.
If they want to claim that Jesus is God, what is their evidence or argument?
Christian kingdoms that have given up the practice of heretic burning have not been able to give any satisfactory answers to these questions.
The practice of heretic burning had the effect of discouraging awkward questions about the idolatry of the Trinity but since that practice was given up, the floodgates of disbelief have opened.
Restoring Truth, Logic and Morality with Secular Koranism