Should a browser based Feed Reader always use something on the client side, like Javascript?

UPDATE: I mean, specifically, for the Parsing of RSS. If you can offload it to the browser, it seems almost irresponsible to make your server do the work. Still, there are plenty of advantages in my particular situation to doing it server side. So I'm just wondering: is it blasphemy, do you think, to make your server do the parsing instead of jquery or the like?