I don't think so.
Overseas Chinese, many of them still have great admiration for China. Rather it was the overseas Chinese that brought in the first wave of investments in the country.
Heard of Robert Kwok?
Deng Xiaoping met him and personally thanked him for his effort in developing China. He was actually a really patriotic Chinese.
I am not asking that you should interfere in internal affairs like barge in with your military, or lecture them on human rights, or decide what political or developmental model they should take.
But the least you should do is to give them a free passage into and out of China without visa, something on the lines of what you are doing for Taiwanese. There can be one overseas Chinese card, through which you can enter the country easily.
Also, citizenship should be given to anyone eager to come back. Remember, Chinese Malaysians are a very entrepreneurial group, and highly educated.
In case of any real riot like situation, efforts should be made to evacuate Chinese.