No. It is not a proper noun. It is only capitalized when found in a title or is being used as a proper noun.
Yes, "I am" is typically capitalized because "I" is a pronoun and should always be capitalized in English.
If you are referring to Allies of World War II then it should be capitalized. Otherwise, it doesn't require capitalization.
Yes, "Arabs" should be capitalized when referring to the ethnic group or people from the Arab world.
Yes it should always be capitalized.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
"Western" should be capitalized and "world" should not.
Yes, it should always be capitalized.
Yes, both Hindu and Hinduism should always be capitalized.
No, the word "rif" is not always capitalized. It should only be capitalized if it is part of a proper noun or at the beginning of a sentence.
When it refers to the language, it should always be capitalized.
No, CRNA does not always need to be capitalized. It should be capitalized when using it as an acronym for Certified Registered Nurse Anesthetist.
"space shuttle" usually is not capitalized unless you're talking about "The Space Shuttle". Endeavour should always be capitalized because it is the name of the orbiter, and names should always be capitalized.