I'm not referring to any specific actions or commenting on who did what. I summarized what I've observed to be the common perception, which is that Iraq and Afghanistan were "forever wars" conducted against the informed consent of the American public, and a spectacular failure of our institutions and both party establishments.

If that sounds lacking in nuance, well, I never claimed to believe American political discourse was particularly nuanced ¯\_(ツ)_/¯

Are both parties equally responsible?

Shouldn't discussions be as nuanced as possible if change is expected?

Of course they're not.

Ideally they would be, but I haven't observed that they generally are and wouldn't make such a claim.