Quote Originally Posted by chico25 View Post
That logic doesn't work when you have a weapon that can keep him frozen solid indefinitely until Kendra is ready to stab him to death with the magic plot device knife that only she can use. And the issue of not removing him from the timeline didn't matter last week when Carter was going to kill him but the plot device knife didn't work for him, it also didn't matter when Rip was going to kill him 4000 years in the past before he could do anything like influence every major leader and event in history.
It's probable that Rip's trip back the Egypt was soon after his wife and son was killed and wasn't thinking too clearly (and might have had a moment of clarity when he held the knife at Savage's throat and hesitated thinking what would happen if he erased Savage from history). The freezing is a good idea but Snart had already left and Rip might have been worried that more of Savage's cult will arrive soon and their back-up had left with Carter's body.