AAQ: Joining the Nachal Hareidi is the greater evil compared to geneiva. Rav Shteinman clearly and explicitly wrote that even bochorim who are weak in Yiras Shomayim should NOT join Nachal Hareidi, since the IDF is much worse.
Only “bochurim who are mechallelei Shabbos and actually committing other grave transgressions for which the punishment is kareis” can be possibly considered to join Nachal Hareidi or the IDF if the “father wants to save the boy and to save the street from enduring damage that we do not have the power to withhold him.”
“But for sure it is an unforgivable sin if he were to persuade or entice in any possible way which might cause anyone who is not a mechallel Shabbos or committing other chayivei kerisos to be placed there” in Nachal Hareidi or the IDF.
Above quotations are Rav Ahron Leib Shteinman’s own words.