that seems to be what some people are arguing.
That seems to be what the heroes believed to have happened - and what the writers wanted the audience to believe happened. Neither factor should force the audience to actually
think it happened, though, especially in light of later evidence.
In retrospect, it was quite probably superior technology at work. At the time of the episode's airing, though, it could equally well have been fanatic dedication to the Dominion at work: another suicide attack to show that not only the Jem'Hadar but in fact anybody related to this sinister organization would be willing to sacrifice her, his or its life at the drop of a hat, with a smile on her face.
Beaming to oblivion was a classic ending to villains in Trek, after all: NOMAD, Tox Uthat and Lore were disposed of that way (even if Lore rebounded). Here a villain would volunteer - what a horrid thought, and what a horrid villain!