Seeing Christian doctrine in the light of real history and life

It strikes me that a profitable way to see the truth of Christianity is to contrast it with something anti-Christian like Islam. One insight as example is how life is very cruel when you don't have a Mediator between you and God. God, after the fall, is not well-disposed towards human beings. The only thing that give some degree of protection is the common grace type mediation between God and man, effected by Jesus' work, and the full protection that God's elect have via having faith in Jesus and having Him as our personal Mediator between us and God the Father.

Islam only has God the Father, El Elyon, God's name as He's known to the nations (and, of course, their false idol god allah who the really satanic in Islam worship).

Because Islam only has God the Father with no mediator their lands are barren, their lives are cruel, their nations are tyrannous. Etc.

Life is cruel for fallen man when you have no mediator between you and God. And, again, non-believers benefit by being in the lands of Christians because common grace flows down on all. He makes the sun to shine on all. That doesn't mean all who are in Christian lands are regenerate believers. They just benefit by being in the vicinity. But when you get into the truly dark lands of peoples like Muslims, where there are no Christians, where the truth itself is suppressed, you see how mean and cruel life without a mediator between man and God is.

Muslims are Arians. They refuse to recognize Jesus as God come in the flesh. Islam is a Christian heresy. They have no Mediator, in a common grace sense, or in a salvation sense.

Seeing this makes doctrine practical. You see the doctrine of the Mediatorship of Christ practically in the light of real history and real life on this planet.