The point is not to have "pro-Froome" mods to argue the case of one side in these situations. The point of moderating the board is to treat things impartially. That does not preclude the moderator having their own opinion, nor should it preclude them voicing that opinion, so long as they are able to take that out of the picture when they are in mod mode. Tonton has several times used "mod hat on" "mod hat off" type comments to demonstrate when they are voicing their opinion as a member of the board, and when they are voicing their opinion with the theoretical impartiality of a moderator. If they feel that the current situation makes it impossible to maintain objectivity when being asked to moderate discussions, and for that reason they do not feel it appropriate to remain a moderator at this time, then that is also very fair.
For what it's worth, while the Clinic often oversteps the mark quite dramatically with regards what it considers adequate evidence of doping, I've seen an awful lot of comments on the "in favour of Froome/Sky" side of the debate that are clearly designed with no intention other than provocation too, it's been far from one-way traffic in that respect. And some of those reported posts may be ones where a private reprimand is all that is needed or even where the mods simply don't agree that the post merited punishing. And at the moment, it is very difficult to divorce the goings-on in Clinic matters from discussing Froome's race calendar, performance and prospects in the PRR board without reference to Clinic matters, since they've shaped his entire 2018 season to date, and I'm sure each and every moderator has their own opinion as to where the line is to be drawn; it would set an absurd precedent to close the PRR thread down entirely so long as Froome remains without suspension, especially when the likes of Valverde have their own threads running happily alongside, but at the same time policing the PRR thread on Froome during the Tour is going to be an absolute nightmare for the mods, since the volume of posting goes up dramatically and keeping track of where that line is crossed at any given moment is inevitably going to be difficult. In the visceral reaction to the decision on Monday morning I can totally understand Tonton's outburst in that thread, and even if you legitimately believe Froome to be clean or, as seems to be ever more commonly the case, believe him to not be any dirtier than any of his contemporaries and therefore undeserving of the apparent singling out that he gets (as I have said before however, there are certain perfect storms of factors, some of which he can help and some of which he can't, that explain why Sky in general and Froome in particular are especially difficult for many fans to accept), you also have to accept that the way in which the case has been dropped has some concerning ramifications for future enforcement of doping regulations, which are potentially harmful for the sport which we all profess to love to at least some degree (and even those who are turning their back or at least claiming to be must love the sport to some level otherwise such a thing wouldn't be such a hammer blow to them).