[MerManMaid]

In short, the problem with using Nazi's as a comparison is the strong emotional reactions people are prone to experience. (Justifiably so to be clear)

When a person invokes the Nazi's while discussing subjects that aren't nearly as heavy (emotionally speaking) the horrors of everything Nazi related, they're leave themselves open to being perceived as hyperbolic. No matter how strongly one might feel about open source, the subject matter is just simply on a different emotional level than all the horror which is Nazi. (and therefore, ought not to used as a comparison)

And again just to be clear, I'm not accusing you of being hyperbolic personally, I just want to elaborate on why some people groan when they see Nazi's beings inserted into topics which they have nothing to do with.