Question

A friend with whom I exchange views — or rather, mostly listen to his sermons — is really an extremist, with dangerous ideas about what should be done to the Jewish people and how to “educate” the people according to his dangerous path, bordering on the insane. Even if only a small percentage of his craziness were ever implemented, the people would suffer greatly.
In practice, he is enrolled in a kollel. He comes, opens the Talmud, drinks tea and coffee, smokes, and stands outside chatting about his crazy views, day after day, year after year. On average, he studies a few minutes a day.
Of course, he has no plan, vision, goals, and so on — just madness, with no defined practical program.
I asked him why he doesn’t go work and earn his bread honestly and comfortably, instead of scraping by on disputes and allowances.
Basically, his answer is that he assumes this is the only way to serve God.
Should I teach him that “the exertion of them both makes sin forgotten”? Or that “any Torah study not accompanied by work will in the end cease and lead to sin”? And Maimonides: “Whoever sets it upon his heart to engage in Torah and not work, and to support himself from charity — this person has desecrated God’s name, disgraced the Torah, extinguished the light of religion, brought evil upon himself, and forfeited his life in the World to Come,” and the like.
Or perhaps the good of the broader Jewish people comes first — that he should remain poor and undeveloped, with his chatter, quarrels, and allowances, and not go out into practical life, Heaven forbid, and learn how to work and advance things.
For who can foresee the outcome? His ideas contain real and immediate danger.
 
What is the Rabbi’s advice on this?