Naomi, yes, their objective to return to the land as an idea, was kept alive through Judaism, which of course was the basis of their culture, and gave them a cohesion that embraced them all regardless of the Diaspora.
And yes, never losing sight of their hearts desire, they used every opportunity to realise their dreams.
And yes, their persistence won over men, men in high places who were able to advance their plans for a homeland.
In all these things you are right.
But you ignore the fact that God uses people as His agency to work put His will, and in the case of the Jews, the improbability of them remaining as a nation without a land, let alone regaining that land, well, the odds against are breathtaking.