Nonsense.

"Failed computer climate models do not show that the dire predictions based on those models have been happening ..."

That sounds like you don't understand modeling. What do you mean by "failed to show"? Why do climate scientists build models?

"... unable to ascertain how ... variations of global climate change of the more recent and distant past happened ..."

That is not true. It is understood that orbital variations have been a major cause of climate change, as well as plate tectonics.

 "...  failed to establish what is the supposed ideal climate ... "

Ideal climate? Ideal for what? What are you talking about?