Is it permissible to hurt or insult the people who didn’t fast?

In my country, some muslims had went out in the street with sticks and they were looking in the hotels and restaurants for people who didn’t fast and they insulted them in front of the whole country (via social media) by hurting them with the stick and insulted them with bad words, curse and threats. So my question is, Is this permissible according to the authentic Islamic rulings?