I am equally convinced, some are radical leftist. Sadaghi's involvement is enough to make that apparent.
Understanding how much sway each faction has is important. One of the reasons that Iran is in the mess it is now is that in the late 70s, groups bought into change without having a true understanding of who would be empowered by the change.
Perhaps some think a crapshoot is a good idea-- hey, let's roll the dice. It can't end up worse than we have now, can it? Get rid of the theocracy, and let's take our chances.
My answer is, it most certainly can end up worse than we have now. You see, a far left regime would be just as tragic for the Iranian people, but would be harder to remove because instead of being the focus of the left-controlled humanitarian groups like Amnesty International, they would get only cursory attention from those groups. They would have the support of far-left groups worldwide, they would have apologetics in the United States media preventing any groundswell of support.
In other words, pretty much there is one shot here once the regime is deposed for the Iranian people for several decades. If the far left, such as those of the same mindset as the TRP, win the day, the opportunity for freedom for the Iranian people will be gone for an entire generation.