In all likelihood, your side stand switch was damaged. The bike will not allow itself to start or run in gear with the side stand down. It doesn't matter if the clutch is in or not, as there is no circumstance when you'd want to be in gear with the side stand down. Check the motion of the side stand and that it's interfacing with the switch properly. The switch on your bike seems to have a wheel and teeth that grab the side stand and move with it. It's quite possible these teeth are damaged and the switch isn't moving as it should. If you have a multimeter you can check the switch for continuity. It should beep when the side stand is up, and not when it is down. Alternatively, you can try disconnecting the side stand switch and bridging the connection to see if that fixes it.
If the problem persists, it's also possible your clutch lever or cable were damaged, and the clutch is not fully engaging. Have a look at the engine side cover when you pull the clutch lever. Is the cable significantly moving the actuator? (#16 on the diagram). The cable should be pulling it and moving it roughly the same amount that the cable pulls at the lever, across the entire range of motion. If there is too much slack, the cable is broken, or it's movement is restricted or uneven, your clutch won't engage properly.
The other possibility is your clutch switch was damaged. The switch is located on the clutch lever, and allows the motorcycle to know if the clutch is engaged or not. This is how it prevents you from starting the bike in gear unless the sidestand is up and the bike is in neutral. Check if you can start the bike in neutral, and with the sidestand up. If so, that could indicate a problem with this switch.