They left no heirs because their efforts were either misguided or as RAV Kook would say they didnt understand their actual place in history. They were great men of conviction who now have past the torch to the next generation of great men. The new Zionist are more comfortable in their Jewish skin. This is true in both israel and the US. As far as Secular Jews giving their lives for the Traditional Jews you need to look at who is actually serving in the Combat Troops. Dati Leumi make up a very disporportionate % of this number and will continue as the left's Heirs in Tel Aviv continue to not serve and dodge the draft or at best become jobnicks.
Netanyahu names Nadav Argaman as next Shin Bet chief (Haaretz)
from the article: The Orthodox tyranny