I like to think that I'm fairly objective, since I don't have a personal stake in it either way but honestly, I never take it that TSs are "looking down" on CDers.
This is what I do see:
Most people speak from their own personal perspective, which is really the only thing they know. So if someone used to identify as a CD and now identifies as a TS, she will likely think this is the path for others. Or, if someone is gender fluid, they will tend to think that others in this community are gender fluid too. Don't forget, we are talking about things that cannot be seen (basic motives) so really it's up to anyone to define it as they will, mostly in terms that make sense to them personally.
To Veronica, I wouldn't waste my time arguing, since this makes a CDer seem defensive. Just state who you are and then move on.
... but keep in mind that you are indeed a part of this community, by virtue of the fact that you present as a woman. You do fall under the overall transgender umbrella, even though you identity solidly as a man. You are not "gender normative", which for men, is a biological male who identifies as a male (like you), who lives as a male (like you), and who presents as a male (unlike you).