Lately I have noticed this phase being utilized regularly; typically by college age (physically and/or mentally) lefties. Its usage bears some examination.
The most common usage is as a means to quickly dismiss an argument by the other side. The concept being that the other side is a hater , with haters being people with the obviously bad hate character flaw. Furthermore, implicitly any argument made by such a person is totally flawed.
People with much hate inside do exist. Some of them are feminists. But dismissing an argument even if the a person fits some loose definition of hater is intellectually lazy. Perhaps a person full of irrational animosity in one subject is totally a clear thinker in another.
And sometimes people filled with animosity have legitimate reasons for this animus. And perhaps their arguments make sense. To dismiss arguments automatically because they have a measure of animus is also intellectually lazy.
Where does much of this laziness come from? Dare I mention Universities. These institutions are supposed to instill students with critical thinking skills (essentially the attempt to determine what is actually true or not). But recent work has shown the they do this poorly. And the current meme Haters Gonna Hate does little to dispel this notion.