Tegmark cosmology implies not only that there is a universe which runs this one as a simulation, but that there are infinitely many such universes and infinitely many such simulations. In some fraction of those universes, the simulation will have been designed by an intelligent entity. In some smaller fraction, that entity has the ability to mess with the contents of the simulation (our universe) or copy data out of it (eg, upload minds and give them afterlives). My theism is equal to my estimate of this latter fraction, which is very small.