This is how I see it.
When read in the context of the Owen Twitter account I can understand why people would agree with comment. Id think 'yes, totally ridiculous that there are people out there that believe these girls should just shut up'. Because I understand the context of why its being said.
However, if written by someone else with a different background I may have a different understanding of the comment.
'Liking' or Retweeting comment does not mean you agree with the literal mean - it could be to agree with the implied understanding.
Bit like ironic comment. When taken out of context it has a different meaning.
Retweeting places it out of the context of the Owen account that brings on a totally different meaning.
Now she could just be a racist idiot t*at that doesnt deserve anyones time defending her. But, looking at her record, I dont think thats true (in this situation). Just my opinion. Get as upset with me if you like.
However, this is without question a bad appointment because it gives people ammo against the Labour party (bit like Corbyns insistance on sticking with Abbott).