If they had high instrumental rationality, they would be effective at achieving their goals. That doesn’t seem to be the case - by conventional standards, they would even be considered "losers": jobless, homeless, imprisoned, or on the run.

That depends on a goal. The goal of a martyr is not life.

Hard to say without hearing them speak for themself.

So far I have 0 idea of any motive.

Supposedly it should be rational, so I would at least like to hear it, before judging deeper.