If this random collection of chemicals (me) can produce "I" then why can't that ever more complex collection of chemicals support an infinitely greater "I".

I suppose we could think that. But I have a great deal of evidence that tells me I exist. Likewise that you exist. I don't have that evidence for an infinitely greater consciousness.

Hawkins says that God doesn't fit in his universe. How does compassion fit?

The fact that things exist that we can't scientifically measure doesn't imply the existence of anything else.