Strange "transwomen are at far greater risk of suffering from male vioence than non-trans women"
This reports 27 killings of transgender people in the US in 2016.
This reports 1615 killings of women in the US in 2013.
So for murders, your statement is clearly not true. Don't even go there with the stats on domestic violence - the figures for women are scary!
In the UK in 2015 this states 186 female victims of homicide and one of unknown gender. I searched media for this case and it is unclear whether the motive was homophobic or transphobic.
This study: Long-Term Follow-Up of Transsexual Persons Undergoing Sex Reassignment Surgery concludes that regarding any crime, male-to-females had a significantly increased risk for crime compared to female controls (aHR 6.6; 95% CI 4.1–10.8) but not compared to males (aHR 0.8; 95% CI 0.5–1.2). This indicates that they retained a male pattern regarding criminality. The same was true regarding violent crime.
So, for example someone such as Lauren Jeska, is just as likely to be as violent post-SRS as she was as a man prior to surgery. This brings into question your statements about reduced testosterone making people calmer and lowering aggression.
And your claim that Jeska had no testosterone at all - how do you then account for the aggressive and violent act that sh'es been convicted of? Or indeed that she refused to supply blood samples for testing (as ALL athletes have to do) if she had no cause for concern over testosterone levels?
And again, please do not use the term non-trans woman. I, and many others here find it offensive.