incite, insight, in sight

Incite or incite means to encourage or rouse to action--
The demagogue meant to incite the crowd to riot.
It is unlawful to suggest violent crime. A speaker should know better than to incite mayhem.

Insight or insight ( always one word, rhymes with incite ) means a form of perception or intuition, such as a particular mental grasp of the reality of something, or of the true nature of something or someone--
The lecturer offered the audience some interesting insight into the problems of foreign relations.
Some people hope a therapist can offer insight into their emotional problems.

Now that you know that, you can say--
"Professional insight on the psychology of crowds may help us discern which speaker might incite a crowd to riot."

Note--not to be confused with the phrase "in sight" ( two words ), meaning visible to the eye, or in view--
Do you see the bus? Is it anywhere in sight?