Trying to shame someone for their lifestyle, looks, weight, race, gender, sexual orientation, religion, etc, etc. Doesn't make you a "tough b****" it just makes you puerile and ignorant. Better yourself instead of tearing others down to make yourself feel superior.
Self-love is not the same as arrogance or narcissism. In fact those who act as if they are better than others are often the ones lacking in self-love. Remember: lifting yourself up should never involve putting others down.
People who think they are perfect and go around putting others down, belittling them, trying to point out weaknesses and using it in a very negative way are narcissistic. It takes a HUGE EGO to knock someone else down and hurt them when you yourself are full of flaws. Leave people alone. What is the point of going out and purposely hurting others other than to get your ego boost. Typical narcissistic behavior.