Aren't you the same person who just told me I am in the wrong subreddit?

I am. I don't think your response to that other comment was appropriate and in the spirit of this subreddit. I stand by that assertion.

I hear this argument, yet it happened fast enough to kill off entire thriving human civilizations as well... so it seems that this is a bit of a relative question.

Forgive me. This sentence reads like you're asking for clarification because previous climate changes "killed off entire thriving human civilizations". I apologize if that's not what you meant.

It was a question

Sorry. It seemed rhetorical.

Or are you just googling and copying and pasting?

I am not. I hoped you weren't unclear on something you'd read in a gas chromatography study and invited you to identify what you thought was a weakness in their methodology.

This is the article I was referring to:

Sorry, but that's a think tank activist who has a history of flame war pseudo-journalism. Here is the Spencer study to which he's referring. Here is an analysis on why that study is particularly poor in statistical analysis and data integrity and also in comparing the performance of multi-decadal Global Climate Models to incremental 10-year runs of a simplified, static climate model. The study is so bad, in fact, that the Editor-in-Chief of Remote Sensing resigned in response to lofty criticism of the paper's scientific rigor.

I'm not sure how you got fixated on extinctions.

Must be a misunderstanding. I'm clarifying that other climate perturbations were, in fact, due to other factors. Some of them led to extinctions. We've studied those factors exhaustively. We also know that our forcing profile should be net negative (previous source). And right now, we should be cooling. We are, unfortunately, not.