Final answer:
Dr. King believes that racial injustice engulfs the community because of the systemic racism and discrimination that African Americans face, including acts of violence, poverty, and lack of support from white religious leaders.
Step-by-step explanation:
Dr. King says that racial injustice engulfs this community because he witnessed and experienced firsthand the terrible acts of racism and discrimination that African Americans faced, such as lynching, police brutality, and poverty. He describes how Black people were treated as second-class citizens and were denied their basic human rights. Despite the hope for white religious leaders to support the cause for justice and equality, Dr. King expresses his disappointment in their silence and lack of action.