Rightly said this is a public forum and HUMANS reply here. If you don't believe in God or if you have any problem with someone's beliefs and religion then i am sorry but nothing can be done. If you really want to go to Canada then you can not live there with such an attitude. Canada is a friendly and open country and welcomes people from every belief and religion. Just because the word ALLAH is used doesn't mean that you have to show up and criticize someone, its all about his/her beliefs and the words s/he wishes to use in his/her moments of happiness as far as it is not hurting someone. If you don't like it then simply don't comment but this is not a way to wish and congratulate someone.
Be open minded and be realistic.