actually....... (warning:agnostic point of view)
your "God" chose to die dramatically in a cross to appeal to the people for their pity.
According to my professor, Christianity's main point is for men to feel pity towards others.. this can be proven by the golden rule,
"All things whatsoever ye would that men should do to you, do ye so to them; for this is the law and the prophets.
( Matthew 7:1) for christianity, "
and
"Hurt not others in ways that you yourself would find hurtful."
(Udana-Varga 5,1) for buddhism.
this means that for christianity, it's the "they do" comes first. if they showed pity to you, you are supposed to show pity towards them too. but for buddhism, it's the "do" that comes first. the rules have miles of difference if you may observe that here: compare them all. (i find christianity's rule as something like a payback thing.)
The Universality of the Golden Rule in the World Religions
http://www.teachingvalues.com/goldenrule…
----only chrisianity is different. all of them talk of do not do something that is harmful to others or do what the others do to you.. but for christianity, it's the other way around, it is, whatever others do for you, u also do for them. (again, difference is miles away.)
You see, for christianity, it is Pity that is moving the christians. So for God to die in the cross especially to mention "it was for the people" people can't help but to pity this "god' , think that they are actually the ones in debt of him, and start to follow him for something they could return to the god who died for saving them from their sins..
God showed pity towards them by dying in the cross, the people are bound to feel pitiful.
p.s. both of my theist and philosophy subjects before support the same reasoning for pity.