What in one way which the relationship between Muslims and Christians worsened?

Relations among Muslims, Jews, and Christians have been shaped not only by the theologies and beliefs of the three religions, but also, and often more strongly, by the historical circumstances in which they are found. As a result, history has become a foundation for religious understanding.

Explanation:

In each historical phase, the definition of who was regarded as Muslim, Jewish, or Christian shifted, sometimes indicating only a religious identification, but more often indicating a particular so­cial, economic, or political group.

the confederates at fort sumter.

"the sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."