Why is it said that World War II started immediately after World War I ended?

it is because after ww1 ended, the ww1 led the consequences of ww2. to be much clear, for example, ww1 ended with the blaming of the Germans, meaning that the Germans had to face much harder consequnces than other countries. this led the Germans to grow their hatred and to secretely build up their powers to fight back, meaning that the Germans were united under Nationalism and we can conclude that after ww1 ended, ww2 was already beginning to shape

Explanation:

an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.