Either:

1) the audience of LW changed significantly in the half-year interim;

or 2) the lack of personal input in the second post caused people to more freely voice their true opinions, rather than those they suspected I would take offense at.

Some more alternatives:

3) A couple of different people chanced to participate in the latter thread when they hadn't participated in the former thread. In short that you generalize from one example.

4) That the latter thread began with your comparison between transsexuality and otherkin, thus anchoring transsexualism to the low status of otherkin - if anything you're fortunate people didn't explicitly compare transsexuals to "stupid role-playing trolls" (the current status that otherkin have in my mind)