Answer:
They assumed that the people they conquered will just accept their forceful ruling and let the imperialists destroy their culture.
Step-by-step explanation:
Imperialism is the practice of increase our country's power by colonizing other countries using our military's power . After forcing another country to surrender, imperialists exploited the local and extract the resources from their territory to make their own country richer.
Imperialists often justify this action by stating that they're doing a good thing by spreading a more modern culture to the weaker countries and the locals would feel grateful for them.
They ignored the fact that the people of these countries were product of their ancestral culture and would not just surrender the land of their people to the foreigner just because they're forced too. They eventually revolted to the imperialists and extinguish their influence.