The reasoning is appalling.
Lib-Dem bloke: "I'm sorry that you believe it appropriate to force Transwomen into male prisons, where they will be in great danger from other inmates".
You could use that reasoning for any group, then.
I'm sorry that you believe it appropriate to force child predators into male prisons, where they will be in great danger from other inmates?
I'm sorry that you believe it appropriate to force notorious rapists into male prisons, where they will be in great danger from other inmates?
Or
I'm sorry that you believe it appropriate to force police informants into male prisons, where they will be in great danger from other inmates?
Or
I'm sorry that you believe it appropriate to force former police officers into male prisons, where they will be in great danger from other inmates?