I don't know if you watch this in French, but there's a new televison program called Bull, in which one person is responsible for a group who chooses jury members. In this program, the perception is that certain people will not be sympathetic to the cause, for instance of women; or, some people don't like the colour red, and for that reason they are not wanted on a jury.
Do such reasons really exist in practice, or do defence lawyers provide much more narrow and objective reasons to refuse potential jury members?