Iran has actually been quite willing to negotiate. It has not withdrawn from the talks, it was the US that did it the last time under Trump.

Are you aware that Iran approved of US invasion of Iraq in the Gulf War? It even allowed the use of it's air space.

Are you aware that Iran was the only country excluded from the Madrid peace talks of 1991 between Israel and Palestine? To counter this exclusion, Iran strengthened it's ties with Hamas and Hizbollah.

Iran is not some insane theocracy seeking of everyone's destruction. The regime is bad for the people, but self-interested just as any other, and benefits very little from full exclusion.

I didn't say Iran has been unwilling to negotiate or that they haven't been diplomatic at all.

The prior comment I was replying to implied that the Iranians couldn't have been more diplomatic than they already have been.

That's simply untrue and ignores much of the rhetoric coming out from the Iranian government related to Israel and the US. More importantly, it ignores Iran's involvement with a handful of non-state militant groups in the region.