165?? i thought it was 117?
It's a line the anti May MP's are rolling out. 165 Conservative MP's are either ministers, PPS's, assistants etc, effectively not just MP's but in an extra job that makes them employees of the govt and so beholden to their employer. Those 165 MP's are more likely to vote for TM because she gave them their job in govt, not as an MP but as part of the govt. If you exclude them then of the backbenchers, not part of the govt machine, the majority voted against TM.
I'm not saying I agree with their line of thinking, this is just an explanation of the numbers and the line they are coming out with. Jacob Rees Mogg has this approach for example.
One sobering comment I saw yesterday was that next time TM walks into the chamber she will know that 2/3 of the MP's in there, all of them, don't think she is up to it. That must do wonders for your confidence.