How can one claim that Trump has honour, when he won't honour a law his administration wrote and signed into law?

During his first term his administration rewrote the free trade agreement with Canada , and Mexico and now threatens tariffs against those countries as soon as he takes office.
He will break his own law by doing so.
If those countries don’t keep illegal drugs, and migrants out of entering the states .
It’s not those countries responsibility to do that, it’s their job to keep them out of their country, it’s the states job to keep out of the states.