Resentment towards business women, especially if he is unemployed
Escort rate is too much for said poster to afford, so he insults for revenge
Religious background has fucked up his mind, and he struggles with allowing full expressed sexuality of women or even himself
He has other issues that made him dislike escorts, and is throwing random insults her way - whatever weapons he can grasp at said moment
He is quite a young boy, immature, and a wenker
He is drunk at the time and speaking out his ass - won't remember in the morning what he said
There is no logical reason
He is a trouble-making shit-stirrer, wenks if he makes a women cry
All of the above reasons