A very one sided statement on your part. Kant showed that you could neither prove nor disprove the existence of God through reason. That demolishes the materialistic arguments against the existence of God. It also does not refute the arguments of Aristotle and Aquinas, it just says they are not conclusive.
IOW, they don't prove what they set out to prove, as far as Kant is concerned - he really didn't save them from Hume at all, so much as just saying they were going about it all wrong anyway.
Anyway, I've never been enamored of Kant much, myself. I'm more of a strict rationalist - what a surprise, huh? ;)
OTOH, if more people took a Kantian view of God, there'd be much less conflict between science and religion to begin with. A God that immunizes himself from reason in the first place has little to fear from logic and reason ;)