Hehe :P
I don’t think that would act against that perse actually. Companies are, as far as I’m aware, allowed to ban religious expressions as long as they do not discriminate and thus reject all of them (which can be rather difficult (without moderation)). Religious freedom and freedom of expression and such go for the public vs government, but not necessarily as far reaching for companies/platforms, which is for example why Facebook has certain guidelines you have to stick to or your content is removed. You could argue it goes against freedom of speech, but it doesn’t in essence. Now if bunq would want to keep certain stuff away from their cards: they could and there’s quite some leeway. Which is to say, if “I love Satan” would be banned, “I love Jesus” should in all likelihood also be banned. But this isn’t exact science as you could for example throw it at “nothing to do with the occult”. All the same, I don’t think it matters much and the name you chose doesn’t hurt anyone unless they choose to be hurt by it.
Still, bunq does allow it so it doesn’t matter for you in the end - but it is always a bit of a gray area that isn’t set in stone at all.
I don’t like any religion, but I’m happy for you that you were able to set the cardname you desire. :)