Looking for info to disprove this stigma, I don't really have much other than one academic research paper I found but I don't think if the guy I'm arguing with would be willing to sit through and read that. He dismissed it as queer theory which he says has been "debunked" idk what the hell queer theory is. Anyway from what I can tell with this dude the simple and more obvious the better but it must also be backed by peer reviewed research
we would only be able to determine this based on crime rates. lets look at the UK. there are only 230 trans people in English and Welsh prisons. assuming transness is at a rate of 0.7% (conservative estimate, generally the case in every country more or less) there are roughly 417,494 trans people in England and Wales. this means crime leading to the imprisoning of trans people is 55 per 100,000.
according to the UK parliament, there are 159 prisoners per 100,000 in England and Wales. So we can determine that trans people are 2.89x less likely to commit crimes in these areas, assuming that the trans population is low. If the trans population is higher, say 1-2%, then trans people do even less crime. It should also be mentioned that the number of trans prisoners fluctuates wildly, in 2017, it was at only 70 trans prisoners. In March 2022, it was 230. the UK, afaik, has been the only country to publish the number of trans people in prison, so its hard to guess what other countries are like.
scotland has said that only 1 out of its 11 trans prisoners has done SV. there are articles that claim 42% of trans inmates in english prisons have convicted sex crimes, but they do not site any official numbers for convictions, only wards that happen contain trans people. it should be noted that lgbt people tend to get separated into unusual wards due to harassment by the larger prison body. scotland was the only one to specifically call out one trans person as ever doing a sex crime.