Why were the crusades mainly for religion? (I’m writing an essay)

Crusades, on the religious side of things, were a vigorous campaign for political, social, or religious change. But, the other part of being a crusade was for the medieval military back in the 11th, 12th, and 13th centuries in Europe to recover the Holy Land from Muslims. They were mainly for religion because mainly of the Muslims because they were taking the Holy Land, and Europe did not want to give it up, so they protected the Holy Land, only to loose against the Muslims.

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what the first or next guy says

"globalization has greatly impacted the united states and american citizens. first and foremost, globalization has spread american influence throughout the world. globalization has opened up more markets for the united states, which in effect american companies sell their products worldwide. there has been a rise of multinational corporations and their influence has greatly increased."