From a story on axios.com by Herb Scribner headlined “Obama warns of ‘demonizing’ rhetoric after Pelosi home attack”:

Former President Obama said Saturday that political rhetoric can lead to violence, especially when people start “demonizing” each other.

Why it matters: Obama’s comments come one day after Friday’s attack against Speaker Nancy Pelosi’s husband, Paul Pelosi. The attack has shaken up members of Congress, who are worried about more potential threats.

Multiple reports suggest the suspect engaged in QAnon conspiracy theories online and rambled about racist remarks.