Of course they are human! But a police force works on a hierarchy and a procedure code, not on the emotions of its members. That's a core point and is actually

Of course they are human! But a police force works on a hierarchy and a procedure code, not on the emotions of its members. That's a core point and is actually crucial in a democracy: police do not act on their emotions. And riot police especially learns to stay as cold-headed as possible and to give tactical considerations over any other. That gives the police an image of a cold-faced monster but I think protestors insulting the police instead of winning them over totally miss the point. And that "shaming of policemen" is just ridicule. Recently in France there was some outrage in the media as there were report that after a wave of suicide in the police some protestors chanted "Police, kill yourself". Other protestors then took the counter and one of the popular slogans was "Policemen, don't kill yourselves. Join us.". Police joining protestors is the best possible victory.