Based on my understanding of history, it is my opinion that kn general, Christian nations were more dangerous to world than Islamic countries during the 20th century based on them starting WWI and WWII in Europe, and their willingness to violently intervene in 3rd world countries/colonies. This dangerous potential is exhibited in this century as well.
In my opinion. Islamic countries are more dangerous in general to their citizens than Christian countries.
I do not understand how you think that certain nations (but not others) that were predominantly Christian started 20th century wars
because of Christianity. This seems to be your implication, but clearly this was not the case. If it is not the case that you think these wars were started
because of Christianity, then I again have no idea what your point is, except to slur Christians. Note that I am an atheist.