Do asians make fun of white people and make their eyes not slanted?

Why do Asians make this a white verse Asian issue, while most people in the world do not have slanted eyes?

Asians are people from Asia. Asia is the largest of the continents with about forty countries stretching from Turkey to Timor Leste. It has three fifths of the people of this world with thousands of languages and cultures. Asians come in every shape and size and have every possible shade of skin, hair and eye colour. Millions of Asians are as "white" as any Europeans.

No humans have "slanted" eyes. All human eyes are the same shape and sit in the same position in the head. Some people have an epicanthic fold in the eyelid. This is common in parts of China, Mongolia, Korea and Japan but not in the rest of Asia although people from anywhere in the world can have epicanthic folds, they are not restricted to northeast Asia.

It's normal for people from certain cultures to make fun of people of other cultures.

Some do.