Offensive slogans at Nawrocki's rally. PiS between a stone and a hard place

At the electoral gathering of Karol Nawrocki in Lębork, his supporters began to chant an insulting slogan towards Donald Tusk. The candidate did not react. In PiS, they are now wondering how to avoid specified situations in the future and what to do not to alienate hardcore voters on the 1 hand, and not to give ammunition to political opponents on the other.