Good for you CottageChicken for informing yourself of your choices, learning all the pros and cons, making up your mind, and feeding your babies in a way that feels right to you. I'm sure most mumsnetters would be very encouraging of you, and would respect your choices. To be honest, I haven't yet come across a mumsnetter who judged / criticized someone who chose to ff from the start (or maybe I have, but it's been on very rare occasions tbh, and others would immediately tell her off).
However. I do have a BIG problem with the term 'breastfeeding nazis'. I also have a problem with the last bit of your OP, where you almost expect other mothers to ask you about ear infections. To me it seems like your post is deliberately provocative. Surely you could imagine that people who feel strongly about bf, and who have struggled to bf, would be offended by the term breastfeeding nazi? Believing in something strongly & working towards a goal- as I'm sure you feel for your own choices & your goals- is not the same as being a nazi. To be honest, there are very few things in this world that are the same as being a nazi, and I personally am offended when this term is used so liberally. I do agree completely that there are rude & competitive mothers- some of them breastfeeders, some of them bottlefeeders- who feel they need to justify & validate their choices by belittling others. But when you yourself suggest (before anyone has criticized you) that there will be others who ask you about ear infections, are you not being deliberately offensive to those who believe- rightly or wrongly- that bf is a good, healthy choice for their babies? Are you not belittling their breastfeeding by suggesting formula is exactly the same, health wise?
Formula is a perfectly good alternative to bf. It's healthy for babies, for the most part. I myself have done exclusive breastfeeding for a few months. Then mixed feeding after that. Then solely formula feeding after 8 months. However, on a population level breast milk is shown to be the preferable choice for infant feeding. There are other pros to formula feeding, I do accept that (e.g. partners being more actively involved). I also accept that on so many other food choices / health issues, different people make different choices. Some eat organic food. Some are vegetarians. Some eat raw food. Some eat their 5 fruit & veg a day without exception. You wouldn't go round calling vegetarians 'vegetarian nazis' would you?
Anyway. Again, as I said, I do respect your choices & I think they're perfectly justifiable ones (and in any case, no mother needs to justify herself to anyone, IMO). But please try to be a bit more careful because the terms you've used & the tone of your OP is quite provocative to all those who made choices different to yours.