The funeral is an informal referendum on how some Palestinians feel about the 'roadmap'. It suggests they are not so much ready for peace as for more war -- but if they want to dance, the IDF will oblige.If Hamas doesn't want to be part of the peace deal, then they are legitimate targets. I'm sympathetic to the idea of a Palestinian state, but Hamas doesn't have a place in a legitimate one unless and until they change dramatically. Until then, they are combatants and should be treated accordingly.
Just don't forget that not all Palestinians are part of Hamas. For the IDF to group them all together would be a dangerous self-fulfilling prophecy. Fortunately the current goverments of Israel and the US appear to realize that.
-Eric