What's wrong with other religion? They teach us to be good too!

Moral goodness is taught in almost all religion. That's awesome.

But the one difference for christianity is that Jesus did not come to make a bad person good or a good person better. He came so that the dead man becomes alive.

So maybe thats why God choose the resurrection route for Jesus; To illustrate that though we're all spiritually dead because of original sin, He has the power to resuurect our spirit man into eternal life if only we trust Him as our Saviour of our souls.