[...others who do not believe that climate change is real and primarily caused by humans take the time to actually look at the data coming from science.]

What an amazingly contradictory letter! 

First, it explains how the planet has had multiple heating and cooling cycles every "approximately 100,000 years", without any human intervention whatsoever, and, next, it wants us to ignore those climate change occurrences and buy into the idea that "climate change is real and primarily caused by humans"!

There is going to be yet another ice age,  and humans do not seem to fare well during those periods.

If human activity is presently contributing to an earth warming cycle, the best long-term outcome of that it is that it will delay the next ice age.

That's a good thing for mankind.

In the interim, humans are apparently quite able to adapt to a few degrees of warmer temperatures with little difficulty.