This is a map problem. Very rarely, a random Pogrom map may cause crashes due to enemy units trying to do something forbidden. All of these maps are authored by Hobbes, so I can reccomend updating all maps to his newest edition (
https://www.openxcom.com/mod/ufo-redux - a very good mod too, a little in the Conspiracy Theory vein); however, this may cause other errors.
As for the situation at hand, well, I won't try to sugarcoat it. Since you're Ironman, you're f**ked. You can try doctoring the save by adding stun level to enemy units until the culprit is disabled and cannot cause trouble. This is the only way out afaik (except escaping the battle). You might also try to kill the culprit, but he's too far and too well holed-up for it to be possible with your weapons (red building behind the petrol station, if that's indeed him - maybe if you've opened the way with a couple of Panzerfausts, and finished him off with the GL...).
In my experience, Pogrom crash of that kind happens maybe once in 50 Pogroms, but I still recommend self-enforced Ironman, saving just before every landing - just in case of a map crash. If a crash happens, reload and land again (have Savescumming enabled so a random seed is used and a different map is generated - both to avoid crash and to play fair
)
Also I'll take the liberty to present the new inventory system, using one of your fine warriors as an example
