Modern cars are laughably easy to steal unfortunately. Can be from simple keyless relay attacks but loads of cars can be stolen by getting access to the CANBUS network somewhere in the car, in some Honda's like CRV or HRV's you can pull the arch liner out in the front and get access to a plug for the front lights, plug your device in and can unlock and start the car within about 45 seconds of walking up to the vehicle.
Physical security and making your car less of an easy target is probably the only real way, so a bollard installed on your drive way, steering wheel lock etc.
But then you do run the risk of them just breaking in to your home and threatening you/your family until you give them the keys.