Was Admiral Marcus in the room when Khan started firing on Starfleet command? I honestly cannot remember. I remember his conversation with Kirk after Admiral Pike had been killed, but my question is, if he was in the room..
How did Khan expect to get his 'crew' back if he had accidentally on purpose killed Admiral Marcus? There'd have been no real way of getting them back as he was counting on a ship to come and arrest him or try to kill him on sight with the torpedoes. Which led to the Enterprise being stranded in Klingon space (something Marcus rigged), which if the Enterprise had been destroyed by Klingons his crew would have died anyway. It was a huge risk IMO for someone with supreme intelligence.
How did Khan expect to get his 'crew' back if he had accidentally on purpose killed Admiral Marcus? There'd have been no real way of getting them back as he was counting on a ship to come and arrest him or try to kill him on sight with the torpedoes. Which led to the Enterprise being stranded in Klingon space (something Marcus rigged), which if the Enterprise had been destroyed by Klingons his crew would have died anyway. It was a huge risk IMO for someone with supreme intelligence.