1. I suggest the area of interest is what information "informed" the opinion.
2. Their opinions could create any number of subsequent actions. I would limit myself to what they say and do. "If you come we will fight you," is a threat, not an opinion.
3. What a population thinks is indicated by words and actions. Assessing those words and actions are the critical part of the job. People who think stuff but do nothing generally don't make an impact.
...and it occurs to me that I may be defending a purely semantic position, but may be not.
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