I wrote up a huge response to this yesterday, and it's gone!! Grrrrr.....
ANYway, the gist of it was;
I don't think it is any of the other parents business whether the rest of the children in your care have their own vaccinations or not, personally. I would also be upset if my provider had told others about my personal/medical choices (which I undertand that you didn't). They choose whether or not to vaccinate thier kids, and that is as far as it goes. When they are at playgroup or the park, or letting their child lick shopping cart handles (*shudder*), they have no possible way of knowing who has had the needles, and who hasn't.
If anyone has reason to be concerned then it's the parent of the un-vaccinated child who's little one is playing with all the kids who supposedly have a higher immunity to some of the typical germs and bugs. But that is the decision that they have made, and they have done so with some very valid reasons, I am sure.
Myself, I am still on the fence. I have read a lot about vaccines in recent time, and although I have 3 kids with up-to-date shots, I am not sure about our newest baby coming. I haven't decided yet whether she will be getting them.
It sounds like you are concerned more so about your own little one, which is understandable. I think the toddlers in your care need to be taught (regardless of who has their vaccinations, etc) to refrain from touching your baby anyway. When my newborn is around, the kids in d/c will be discouraged from kissing and hugging and loving on her. Partly a germ thing, but also because kids don't realize how strong they are when they are with a baby. Especially the littlest ones who may still think of the baby as a dolly/toy, and not my precious new baby, haha! It may seem kind of harsh, because of course they only mean well, but I think it's best/safest for everyone.
I am sorry that you felt attacked, because that is not what we are here for. But I know for sure that nobody meant for you to feel that way. We just all have very strong opinions on some stuff, right?
So to sum up: immunizations are a total non-issue for me, and it's totally the parents business. I would be more concerned with teaching the little ones to "look with their eyes not with their hands" and so on when playing with baby.
(Haha, guess it ended up being a long post again anyway!)