Why did the crusades change relationships between christians and other groups?

I know im late but my answer may be useful too.

Some Christian crusaders attacked Jews, Muslims saw the Christians as bad invaders, and the fourth crusade attacked other Christians

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the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

i am confused, what is the question? i can you out if you put it into more depth.