@Jacoobus:
This is a pretty keen observation, but I don't agree with the idea that he has no chance of competing with Arlong. Arlong was never in charge of the Fishman Pirates and I doubt he was as close to Fisher Tiger. Arlong is being made into a martyr in order to justify and garner support for the New Fishman Pirate point of view. Jinbei on the other hand is the legit successor to the man who started the Fishman Pirates.
I don't expect every Fishman who has bought into the idea that all humans are enemies to suddenly change their minds, but I do think that by setting the right kind of example Jinbei can prove to them the error of their ways over time. Arlong is just the drum they're beating right now, he doesn't have Jinbei's legitimacy. Jinbei is a symbol whether he wants the fame and responsibility or not. Arlong is like a balloon that someone is filling with hot air and then trying to give meaning to.
Personally, I would say you both seem to be making a mistake in implicitly referring to 'the fishman community' as a cohesive whole. What follows is more or less completely theorizing, but I believe there are potentially as many as three different sort of groups when it comes to opinions regarding Arlong and Jinbei.
First, are those whose respect and admiration lie with Jinbei. To me, this is most likely to be the older generation, those to whom the trauma of slavery and the meaning of the Sunny Pirates is still very real, as opposed to a more vague, intangible history, as I mentioned in my previous post. These people I imagine would have a respect borne from their knowledge of Jinbei as a person, of his likely close connection to Fisher Tiger, of his personality and ideals. To this group, I would not think Arlong would have much chance against Jinbei; even if there are those who are less inclined to Jinbei's view of things, and lean more towards Arlong's, the very fact that they would respect Jinbei for who he is to me implies that they would be unable to respect Arlong for the same reason.
On the other hand, we have the Arlong supporters. This group, at least, is already confirmed as canon, in the form of the New Fishmen Pirates. Here, I am inclined to agree with Jac's assessment of his role to his supporters: he has been turned into a symbol for his actions, as a burning torch for their own world view. However, I do not believe this makes him any less legitimate, or more hollow, a figure than Jinbei, at least to this relevant group. Still, there is a notable dichotomy, since it is a matter of action versus character. Arlong is the only fishman we as readers know of that struck out against the humans in such an extreme manner, and judging from the NFP's view of him, this is in fact the case. Although it's impossible for now to say if it was his actions that inspired their view, or if it came about on its own, there is no doubt that they stand as the epitome of what they believe in and would hope to strive for.
Finally, there is the potential third group, which I would expect and hope to be the largest, although we will have to wait and see: the average citizens. Admittedly, to my recollection, every fishman we have seen thus far in the story has been anything but 'average', and as a race known for their incredible physical superiority, it might seem like there are no such fishmen. However, I believe much the point of the history revealed on Sabaody was meant to humanize this race that up until then had been represented by Arlong, and all that that entailed.
So, I do believe that, just as with any of the other races and cultures we have come across so far, there will be many if not a majority of fishmen who simply do their best to live their day to day lives. I believe this would be the most interesting group, as their opinions are the most open to being changed and molded, either by one of the former two groups in this post, or, hopefully, by Luffy in his time there. As for who they support, it could be Jinbei, or Arlong, or perhaps a degree of respect and admiration for both; or, indeed, neither, as despite how built up it has been, I can nonetheless imagine it being possible that the issue of slavery is removed enough from the average citizen that they simply aren't invested enough to choose a figure of admiration.