I agree with lazo that there is a double standard over laughing at female on male violence and of seeing it as justified, the last straw, an act of desperation etc, but never the other way around. Just because the screen shot is from 2007 doesn't make it less valid, does it? He was challenged to show some evidence to back up his point and he did.
I disagree that 'all feminists' don't care about female on male violence, or will laugh at it. That's ridiculous.
But I think I know what he means, though he has expressed it clumsily and unintelligently. Radical Feminists in general put very little effort into denouncing examples of female on male violence (or other perceived anti-male behaviour) when invited to do so. For example on a thread like the one in the screen shot they will sneer and laugh at worst, (the unintelligent minority) dismiss it or aim to justify it (the overwhelming majority) or just ignore it and refuse to engage in a debate about it at best, because they cannot defend the indefensible but as a matter of principle will never take a man's side over a woman's in anything. Even having his cock set alight when he's minding his own business watching TV, because his ex wife is miffed that he can't afford to move out.
So their answer is to just ignore it.
Whereas they have an insatiable appetite for discussing/analysing at enormous length much less serious, sometimes quite trivial and tenuous examples of men being a bit shit to women.
It's a bit like the UK masses demanding that all very devout Muslims and Islamic clerics stand up and publicly denounce Islamist terror attacks to prove that as Muslims they are not terrorist sympathisers. Many do of course, but the deafening silence from the remainder does tend to make people rather cynical.