And plenty do not, what's your point?
I think the distinction should be socio-cultural: if you don’t accept that this civil union is “till death do us part”, then by definition it shouldn’t be marriage - it’s a civil union. All the same benefits of marriage with none of the cultural components.
It's not my responsibility to advertise my belief system to you.
The state shouldn't be in the business of certifying christenings or bar mitzvahs, nor should it be in the business of marriage for the same exact reasons.
> Nobody in my family is religious
point is out of place (because whether the family is religious seems to have little relevance)