The argument that Kennedy makes in his “Ich bin ein Berliner” speech is:
Many Germans have suffered under communism.
In his speech, Kennedy emphasizes the harsh realities of life under communism, particularly in Berlin, where the Berlin Wall symbolizes the division and oppression that people faced. He speaks about the rights and freedoms that are denied to a significant portion of the German population and highlights the moral issues associated with communism, making it clear that he stands in solidarity with those who yearn for freedom.