Yes. I am not sure exactly what proof you are expecting but that is all the proof that exists (for obvious reasons, surveys do not generally ask specifically...

Yes. I am not sure exactly what proof you are expecting but that is all the proof that exists (for obvious reasons, surveys do not generally ask specifically...do you hate X group of people? In the UK, saying that you do has legal implications besides anything else). It is equally true to say this of lone single female parents but that doesn't appear to have quite the same effect on tilting the Daily Mail crowd (because poor powerless women aren't seen as a threat whereas young single males are).