In addition, I agree with Erin1700. The initial email was appropriate, the follow up email berating parent for attending PT conference was way out of line.
IF I had something to discuss with the teacher I would expect that I should be treated with respect as a parent, not berated.
Berated??? First there was only one email according to OP.
Where in the email was the teacher berating the parent for wanting to come in? The email reiterated that OP's child was doing well, that there was no need for her to come to a face-to-face conference UNLESS the OP wanted to.
In no way could the teacher's communication be interpreted as a "berating."
You are reading waaaay to much into the message.
OP, maybe the teacher was just making sure that things were still status-quo since BTSN. While the school I'm teaching at now has conferences very early in the school year (only a couple of weeks actually between them & BTSN), I've been in other schools where the time frame was much longer, maybe 6 or 7 weeks. A lot can change in that time frame, so maybe the email was just reassuring you that your child was still doing a great job.
PSA here: (and not saying that this is the case for OP) Parents please know that the vast majority of teachers are not looking to get out of any work when they suggest you don't need to come in for a conference. The fact is that most of us understand that family life is busy; two parents working (frequently during the times when conferences are being held), your children are in after-school activities, in this economy many parents have gone back to school themselves and may have class at that time, doctor appointments (I know in most cases I have to make an appointment 3 months in advance - cancelling an appointment means another 3 month wait), caring for senior parents, etc. We know that a lot, and I do mean whole heckofalot, of parents feel it is a waste of time to come to a conference to just hear the teacher go on about what they already know about their child. We know this because parents actually tell us! So when we offer you the option to not attend, please don't read the message as not wanting to meet with you. We want to meet with you, even if your child is the rare perfect kid. In reality, we're just trying to be considerate.
ETA: Just saw the OP's post that was not there when I started my post. You have very good reasons for wanting to see your child's teacher. It's rare when a teacher (or any other professional) with a poor reputation hasn't come by it honestly.