Jones is extremely credible, everything he says is backed up by mainstream media articles or government documents.
For example, his latest documentary 911 Martial Law Rise of the Police State has hundreds of documented reports.
http://www.martiallaw911.info
Jones takes government documents and news, and conforms a theory regarding an imminent NWO.
Rense is another story, he's into the ET thing. Which very well may be real but it's not my cup of tea so I can't give an opinion.
According to AJ, PO is a scam in order to make us dependent on the government and to bring about the NWO.
Here is a link to some of his peak oil articles.
http://www.searchinfowars.com/pp/index.php
Personally, I am about 70% believer in PO. But you must keep your mind open. Step on the other side. Peak Oil shouldn't be a religion.
Now why didn't I take the blue pill.