This is just another instance of a handful of Black people making a claim that they want or expect to be justaposed onto ALL Black people.
How many Black women/mothers said that?
They do know that there are close to 50 million Black people in America, don't they?
So, one, or ten, or 100 or a thousand or even 10 thousand Black people/mothers don't and cannot speak for ALL Black people/mothers, or ALL Black mothers whose sons date women of other races.
Statements like that are often made by Black people that don't really know many White women, cause news flash, White women and all other non-Black women are no different than Black women. There are plenty of non-Black women who their sons will or may "receive better treatment from", and there are White women who will raise hell, be aggressive, and use and play the hell out of their sons.
Black people seem to do just as much in the stereotyping of Black people as the most racist White people, and/or the most racially ignorant White people in America/the world.
My brothers have dated White, Asian and Latino women over the years and all of them have been different, from the mildest, most meek type woman, to the biggest hell-raising 'itches you ever seen. So, so much for stereotyping non-Black women as ALL somehow, being meek, timid, submissive little fairy-dust women.