Finding out mistakes: Agnes was upset by some of her husband's religious ideas

[Duc]

'''''''''''Agnes was upset by some of her husband's religious ideas''''''''''''''
This is the question that makes me confused.I think the only"possible" mistake in here is "ideas" but I don't know how to correct it.
By the way,could you please distinguish these: view,idea,opinion,thought.
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Don't see your shade think you are great

[Inga]

Hi,
may be religious beliefs? (orientation)
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I am an incurable optimist.

[Molly]

Or it could be "ideas/views on/upon religion"?