It is logical that Germany would be anxious to prepare for the contingency of Americas entrance into the war on the side of the Allies.
And it would be naive to think that every belligerent was not doing something of the sort.
And the frenzy created by Britains friends in the American press over the German Ambassadors inquiry was very effective indeed.
Do you imagine however that England would have enforced Canadian neutrality had the USA supported the Central Powers?
What it said was that the Germans wanted America to remain neutral.