Credible information is simple to find. You might, for example, find this of interest:
http://en.wikipedia.org/wiki/Milankovitch_cycles
You seem to make a big deal of CO2 increases not initiating warming cycles. What inference are you trying to make from this? David Bellamy used this fact to claim that CO2 did not cause global warming. This argument is of course bogus, and for fun you might find the logical flaw.
You might do well to check each part of your argument in turn, rather than aimlessly flitting about.
