We're talking treaties, not deals. Either we stand by our treaties or we don't. Either we stand by our allies or we don't. If Trump wants to rip the treaties up and say to Germany or Korea or Japan no defending you until you pay us for it then why would they want to enter into a treaty with us again? After all some future president can say, "You need to pay us more so I'm ripping up the treaty." What Trump is saying is that we're not allies but mercenaries, loyal only so long as they pay us.
Did you read the rest of my message. Where I said he will even honor an executive agreement (not even a treaty). I haven’t heard him say anything about tearing up treaties.