As far as I understand, 'Hoder' is, first, a proud Iranian nationalist. To him this seems to mean supporting a strong Iran -- complete with its Islamic Revolution, nuclear (weapons) power and all -- a nation ready to engage in dialogue with other countries from a position of strength.
Those who, reportedly, had him arrested don't seem to have got that.
P.S. Solana Larsen cautions on rumours, and says:
We published a note on GV Advocacy with "arrested" in quotation marks:Certainly, the comments on the GV note indicate sharply diverging views as to what may be going on.
And Ethan Zuckerman has written something more extensive in his blog: