“Only about 15% of Jews are frum today.”
15% of 12-13 million is millions.
But it does not matter what the number is; there have always been Jews who attempted to assimilate, this is what Channukah describes, and Jews who have cleaved to the Torah. There will always be a Torah true community. The Torah is eternal, it predates our world, and to the extent Jews live by the Torah, it will keep them secure and strong. Only when Jews abandon the shield of the Torah are they vulnerable to the enemies of Hashem.
Baalei Teshuvah is a growing phenomenon – when any Jew, no matter how distant from an observant life, meets a Jew who personifies the Torah – they cannot but be influenced by the chen of the observant Jew. The only way to bring Jews to Torah is by living the Torah. If you try to attract them by watering down the halacha, you are leading them away from Torah, it won’t work, nothing is as persuasive as the wisdom of Hashem – it is timeless and never outdated. Certainly nothing devised by men attempting to “modernize” the Torah has lived as long as the Torah, all of the various -isms die out sooner or later.
“in my opinion, your opening, “f a Jew finds it to be so, the problem is with the Jew…” to be inconsisent with your closing- “as individual Jews, all should be embraced…”
There is nothing inconsistent with saying that the problem is with a Jew (the problem is with his understanding of the halacha: it’s purpose and what true freedom is, not the Gentile idea of freedom) and not the halacha, but being willing to embrace that Jew nonetheless and hopefully show him, by example, the beauty of living under the yoke of the Torah.