[kenfox]

You think there is a conspiracy to supress detailed global temperature measurements that were taken before 1880? It's interesting that we have ways to estimate global temperature before 1880, but that marks the start of modern record keeping.

It also has the advantage of showing the blip of very high US temperatures in the 1930s. People also complain about bias if those extremes are left out.

[TangoTrotFox]

I'm not sure my personal opinion is relevant, but the answer to your question is no. But understanding the typical patterns of climatic change is absolutely critical for making an informed opinion. These sort of presentations prevent a misleading snippet of climatic activity that is taken out of the critical context of typical patterns. Consequently it seems intentionally geared towards trying to provoke people into responding in an ill informed fashion.

And while I suspect this is well intentioned, I also think it's more likely to backfire than to help produce positive change. Poisoning the well [1] is very much a thing. When information is presented in a way that can be shown to be very misleading, it tends to make one question the integrity of all other data even when it is presented in as forthright a fashion as possible.

[1] - https://en.wikipedia.org/wiki/Poisoning_the_well