I'll tackle this point since it's been ignored by everyone else. I've never met an atheist who wasn't aware of the teleological argument, putting aside those who are atheists simply by apathetic default. The teleological argument has been moribund since the time of Darwin, preserved by creationist charlatans, and these days it clings on by a fingernail with hollow god of the gaps notions like fine-tuning. I think we can all see where this is going, given the past record of science vs theology.
As for the Summa Theologica, perhaps theists ought to consider reading something written more recently than the dark ages. Nothing in that text holds weight today, it's a series of bold assertions, backed up by nothing. Aquinas seems to get a free pass which no one deserves, it's about time it was revoked.