Because violent hate crimes have increased generally.
"2. Police recorded hate crime
Key results
in the year ending March 2023, there were 145,214 hate crimes recorded by the police in England and Wales (excluding Devon and Cornwall police[footnote 2]), a decrease of 5% from the year ending March 2022 (153,536 offences), the first fall since the comparable time series began in the year ending March 2013
prior to the fall seen this year, police recorded hate crime offences rose between the years ending 2013 and 2022; this prolonged period of increasing offences was thought to have been driven by improvements in crime recording by the police and better identification of what constitutes a hate crime
there were 101,906 race hate crimes, a fall of 6% from the previous year when there were 108,476 offences, this was driven by a decrease in racially or religiously aggravated public fear, alarm or distress offences
as in previous years, the majority of hate crimes were racially motivated, accounting for 7 in 10 of all such offences (70%; 101,906 offences)
religious hate crimes decreased by 4%, from 8,602 to 8,241 offences
sexual orientation hate crimes fell by 6%, to 24,102 offences, while transgender hate crimes increased by 11%, to 4,732 offences
disability hate crimes fell slightly (by 1%) compared with the previous year, at 13,777 offences
over half (51%) of the hate crimes recorded by the police were for public order offences, 41% were for violence against the person offences and 5% were recorded as criminal damage and arson offences
Transgender identity hate crimes rose by 11% (from 4,262 to 4,732) over the same period, the highest number since the time series began in the year ending March 2012. Transgender issues have been heavily discussed by politicians, the media and on social media over the last year, which may have led to an increase in these offences, or more awareness in the police in the identification and recording of these crimes.
Figure 2.8: Percentage of selected offences resulting in charge/summons, by hate crime strand, offences recorded in the year ending March 2023, England and Wales, 30 forces"
Source: Police recorded crime, Home Office Data Hub
https://www.gov.uk/government/statistics/hate-crime-england-and-wales-2022-to-2023/hate-crime-england-and-wales-2022-to-2023