Admittedly, the last time I really tested this was a few patches ago so I will happily throw out the caveat that this may have been changed in a recent patch but I'm not sure. I should probably put it to the test again.
I had some time to kill so I went ahead and ran a quick test of my own (deity difficulty, standard size, terra map just to ensure the AI would be close by). Here's how that went:
1) Trained a slinger. This would literally be the only unit I trained (and I didn't buy any with gold either).
2) Met Cleopatra on turn 6. Instantly denounced her.
3) Ottawa reaches population size of 2. Start training a settler.
4) Met Hammurabi on turn 12. Instantly denounced him.
5) Settler finished, I send him to forward settle Cleo. I forward settle her to that point that loyalty would be an issue if I hadn't found a governor title from a goody hut. She is not happy about this.
6) Ottawa starts building a holy site. Already purchased a monument there with the gold I'm not spending on units.
7) I accumulate enough faith to get a pantheon - "dance of the aurora" is still there!
8) Make ridiculous demands of Cleopatra. Why not?
9) Holy Site finishes, time to spam prayer projects.
10) Denounce Cleopatra again.
11) Denounce Hammurabi again.
12) Purchase a monument in Toronto with all that gold I'm not spending on units.
13) Ancient Era ends, still no declarations of war.
14) Popped a great prophet to claim the second religion. Had the choice between Work Ethic (to pair with Aurora pantheon) or Choral Music. Nice!
15) Figured that was enough, logged out satisfied with results.
It sure seems to me like the AI still won't declare war on Wilfrid no matter how much you egg them on. I feel very confident based on a ton of games played over the years that with any other leader the AI would've come after me, but not with Wilfrid. Granted this was just one test but I've had similar results in the past as well. If someone can show me definitive proof of an AI declaring war on Canada - not pulling them in by declaring on an ally, not pulling them in through emergencies, but actually declaring war on Canada straight up - I'd love to see it.
This is why I've always argued Canada is underrated. There's a lot you can do in the early game if you go into it knowing that you don't have to waste time or gold training units. The perception is their bonuses come too late - this is a huge bonus you get right at the start of the game!