I've worked as a DRO in the Canadian election. There is no way to steal an election in Canada. Whatever the Balkans have, that isn't what I'm talking about because the way it works in Canada is like this:
1. I take someone's ID, I look them up on the voter list. If they are not on the voter list I take their proof or the sworn testimony of someone that does live in the district that they live where they say they live. Either way, observers can record their name and supposed address.
2. I hand them a folded ballot and they go, with assistance from a family member if necessary, to behind a security wall to mark their ballot.
3. They place the ballot in the slit of the box, folded so their vote is secret, but visible to all observers so that they couldn't not have snuck in a second ballot.
4. The ballot box never leaves public view. In the event of an emergency I take the ballot box and hold it high so that everyone can see it, especially the observers, until we get outside.
5. Anyone in line by the time the polls close is allowed to vote and number of voting locations are determined by a public service (not politicians) so we don't disenfranchise voters or unduly burden voters.
6. In full view of my assistant poll clerk and all observers we count every ballot. As DRO I have final say over questionable ballots. If I make an obviously unfair call observers can alert my superiors at Elections Canada. I only had to make one decision on one ballot out of around 500.
7. We compare the count of people, the count of the ballots we gave out, and the count of the ballots in the box. These all must match. If they do not match we count again. It's harder than you'd think because people accidentally fuck up ballots or someone can have the same name but be a different person. This can even happen at the same address! Usually a son being named after a father.
8. I fill out the vote totals and give one copy to Elections Canada, one copy to each party observer, and I keep one copy for myself. We then put security tape around a tamper evident bag with the original ballots for them to be counted again by Elections Canada HQ.
Now tell me, how are you going to fraud that system? We wrote down everyone's name, at most you might be able to get someone to vote on behalf of their brother here or there. Or the people voting by mail might have their ballots disregarded or changed, but most people vote on election day and Elections Canada is trustworthy and explainable to anyone.
I could never fully trust your NemId system because you could never prove to me that everyone that supposedly voted existed. In Canada's system we can literally count the people walking through the door and we can literally count the individual ballots.