My Girls Are 100% Jewish

So I’m at Thanksgiving last night with my husband’s family and religion somehow came up (does it come up as much with families that are all one religion, or do I just notice it more being from an interfaith family?).  I was discussing how my daughters actually like going to temple (have no idea what I’m doing right there) and my husband’s uncle mentioned that they are half-Jewish.  That got the hairs on the back of my neck to rise like a disturbed cat.  I don’t know about you, but my kids aren’t “half” anything.  They have a Jewish mother and a Catholic father but they aren’t half Catholic; they are 100% Jewish.  I didn’t even know how to respond without offending him (and more importantly my mother-in-law) and to top it off my mother was sitting right there too but thankfully it either went over her head, she didn’t hear it, or the filter between her brain and mouth was working (it doesn’t always work) and she kept quiet.  If she did hear I can’t wait to see if she comments next time we are together without my husband around, that’ll be a hoot.

It bothers me that I didn’t know how to respond.  I am so grateful that my mother-in-law is cool (or at least an academy award winning actress) about my girls being brought up Jewish and no one else from my husband’s family has ever said anything negative about it, but the 50-50 comments bother me.  Is there a way to address it or do I just let it go, knowing that my girls view everything correctly and that it will all get sorted out as they get older?