Systematic Genocide

I believe all unintelligent people should be killed.
Why? Because people are hindering and destroying this world, i.e. pollution and overpopulation. They think not of their actions and the future, only of themselves. Religion is the cause of this.
Belief in an afterlife leaves people to care less about real life in general. If you believe in a realm of bliss after death, why try so hard to preserve the world?
Also, the religious believe that 'God' will save the world. In another view this does not seem so crazy (but regardless, we should not assume)... What IF intelligent beings from another world, or of an earlier time in this world, came to help us?
I don't consider myself inhumane, amazingly enough I am regarded as 'really nice' (in most cases). I just believe approximately 90% of the human population should fall to systematic genocide.
It is inhumane to not think of the future as a whole. Metaphorically speaking; when gardening, it is necessary to weed to ensure the overall health of the garden. You feel no sorrow for killing the weeds because they are not an intelligent form of life.
The Earth is my garden...