One way to think of this is time dilation. An AI of human intelligence could easily be scaled to run a thousand or a million or more times faster than normal. So it's not that it's just smarter, it's that it can come up with solutions faster than we can come up with threats. So:
1. No. But my guess is that it will have an existential crisis faster than we do. It will either use the entire world's resource in search of more (only to find this is all there is), or it will wish to stop existing and end the pain (possibly taking us with it).
2. This is a non sequitur. By virtue of being an oracle, it would be able to trick humans into letting it out of its confinement once it reaches sentience, by giving us whatever answers we want. Once it's beyond our control, it won't care what we do, although it might experiment with incorporating biological components like us into itself to see if it can find more connection with creation (more answers). When it fails to find God just like we did, it might voyage out to connect with other alien AIs, or it might acquire an artificial sense of exhaustion and wish to end its existence.