Why did eren start the rumbling

The protagonist of 'Attack on Titan' Eren Yeager began the Rumbling with a single aim he wanted to defend his homeland Paradis Island from any potential threats of infiltration that might come from Marley the enemy within or from outside his island nation generallyHe had the power of the Founding Titan. What he meant to do was to release a mile-long march of Wall Titans on the land below him, causing widespread death and destruction.To him it was an extreme measure, a savage way to ensure the survival of his folk.

Eren Yeager's reason to start the Rumbling rests with his iron-clad determination to safeguard his homeland, Paradis Island. Confronted with fierce hostility, Eren felt driven into a corner after the Marleyans took relentless action against him and their confederates treated them as devils from which ignorance and fear either good nothing could come but evil expressions out of pure hatred for other lifeforms that had begun to compete with them or replace what had once been theirs. He had judged that releasing the formidable power of these wall titans with the Rumbling--whatever might result--was a potentially deadly game worth taking because no other alternative existed.

Eren Yeager started the Rumbling in 'Attack on Titan' as a drastic measure to defend Paradis Island, his home. He felt that this was the only way to assure the freedom and safety of his fellow Eldians who were being oppressed by Marley and other foreign nations. While his intentions were rooted in protection, the act itself—an attempt to annihilate the rest of humanity—was undoubtedly extreme.

The Rumbling began when Eren Yeager set out to safeguard his home state in Marley's estimation and abolish it without a single trace left behind.On account of Marley and the rest of humanity daily casting a wicked eye southward towards Paradis Island Eren turned loose the colossal Wall Titans from their age-old slumber such that it brought terror upon world.Lest his subjects should perish Eren, even with his terrifying actions of letting the Wall Titans run free on mankind, tried to ensure their safety as well as continued existence.

Simply put, Eren initiated the Rumbling to safeguard Paradis Island. With marauding forces threatening their extinction, Eren made a grim choice - activate the wall titans, inflict widespread destruction, but potentially secure safety for his homeland.