I did a net search on that word phrase and found three places in which it was used. Sure enough, the PBS newshour transcript came up:

"And so if he thinks he's the only honest man, I give him an A-plus for grandiosity and bellicose poetry."
Originally Aired: December 19, 2008

In addition to David Brooks speaking of the current Illinois governor, Simon Bainbridge also used this phrase in _British Poetry and the Revolutionary and Napoleonic Wars_:

"the singing of patriotic songs and the performance of bellicose poetry" (pg. 12)

Yes, that is adding to the picture. Andrew Shryock gave further view to this sort of patriotism:

"the bellicose poetry composed in honor of long-dead 'Adwani shaykhs, with its valorization of swordplay" (pg. 301)

It didn't take me long to find a facial model. I drew him, then came up with warlike rhyming words. Next, I reconsidered the Illo theme, _VoiceS_:
there is more than one voice.

So I flipped the man over, and thus two very similar people who none the less consider themselves enemies are voicing their 'bellicose poetry'.