Rewatching Terminator Genisys and I have a couple questions. *SPOILERS*

Current Events

When Kyle and Sarah time travel to 2017 and John Connor meets them in the police hospital or whatever, why didnt he just execute them right there? Hes already an evil terminator by that point.

Also, why didnt they go through with the Genisys trilogy? I wanted more of this glorious train wreck.
Let me talk to your mother. Get your mother please.