"[...]and it comes off as opportunistic activism to leverage this crisis to push a nakedly leftist political agenda."

That may be true, though I suspect it's equally plausible that this outrage is indicative of a nakedly capitalistic agenda promoted by Amazon's competitors via proxies. I don't see any reason why it can't be both.

Edit: To clarify, I should have ended my statement with "...why it can't be both, in addition to legitimate concerns."