Open Question: Why are some men hate big girls so much to call us fatties and blimps?

I just don't understand how some men can be so uncaring when they discuss fat girls. How can they be so superficial to almost hate someone based on their appearances? It just seems to me to be characteristic of someone being a racist, or like someone else we know who believed the perfect race consisted of blonde hair, blued eyed people. So why? Why are u men so hateful to big women?