The comment itself isn't offensive; the motive behind it is. It's just her contribution to the lionizing of Rittenhouse by the right wing as some kind of "patriot" hero. You know, like this from Tucker C:
"The picture that emerges is of a working-class kid who sincerely believes in America. His community falls apart, and he tries his best to do the right thing, at a time when almost no one else in the community is trying to do the right thing. But he does. And in return for that, the state, under political pressure, throws him in prison."
Rittenhouse is being used for political purposes all right...by the likes of TC, Boebert, and MTG who wants him to receive the Congressional Gold Medal. For what? Making a stupid decision as a minor to get a gun through illegal means and put himself where he had no business being.