God does not want us to live in an environment where mass shootings happen -- and happen far too often. I do not believe this is the way God intends for us to live. God's vision for earth is a reign of justice and peace. God's desire for humanity is to love and live in harmony.
To be Christian does not necessarily mean that you've received the sacraments of the Church and so have performed the proper rituals to qualify as a Christian. Do not mistake the performance of rituals with practice of faith.
I believe that in evolution itself we can find what God wants. Even as we wreak havoc on the ecosystem, produce more babies than we can feed, and go to war against one another, the call echoes forth: keep life alive.