95 VW Jetta won't start after changing radio.

Pull the radio and check the wire connections.

Check groundwires everywhere that was touched.

Yes it is the anti theft disabling the starter. First try locking the doors with the key then unlocking them. If that doesn't work you may need to obtain radio code and possibly take the wiring harness for your antitheft module and tie #5 and #6 together to bypass. Another solution is to install a push button ignition using a switch or button from radio shack connected from a hot lead to your starter harness (just above the tranny right hand side of engine bay). Let me know if you need pictures or if you've solved this.

My above answer is for future viewers

Is there a fuse? And can you send pictures of the starter?

Need help