I wouldn't say a slap in the face. There're bound to be differences in opinions and methods, that's why we have many opposition parties instead of one. However, I don't see the various opposition leaders in Singapore slapping each other. SDP may not support certain WP methods, WP may not support certain NSP practices, NSP may not support certain SDP ideologies etc. etc. However, some overzealous supporters from every side may take it personally and exaggerate the differences.
For example, in Malaysia, differences are even more obvious and pronounced. In the PR opposition alliance, PAS wants an Islamic state in their manifesto. DAP wants a secular pluralist state and would never agree to an Islamic state. Irreconciliable, yes? But still both are part of the same alliance that inflicted such damages to BN, their common enemy.
In context of Singapore politics, SDP supporters blaming WP for disunity or WP supporters blaming SDP for disunity. This simply won't work. In the end, who's to blame? Who's to be the judge of who's fault is it?
Perhaps that is where our differences lies..
"I don't see the various opposition leaders in Singapore slapping each other." - they did not literally slap each other, but through comments made e.g "we need a guard dog not a mad dog", "WP has no problem finding a lawyer", "JBJ's ideal is ahead of times", "I voted THP as he is a "better candidate" (as compare to another opposition candidates), and Sylvia Lim's subsequent remarks thereafter and etc. these comments do has a effect in putting down other opposition leaders, be it directly or indirectly.
We can have differences in opinions and methods, but that should not stop the opposition from standing in solidarity against the ruling party.
having a opposition who has time and again shown their solidarity towards the ruling party and not their fellow opposition is definitely not ideal..
In M'sia, when people from the opposition camp is arrested, all other opposition comes together, lawyers will be ready to defend those arrested. This is something we have yet to see in SG..instead, when our opposition here is arrested, no other opposition will dare come forward even to make a statement that our Ruling Party has gone overboard. Not to forget, many are quick to distance themselves from those arrested / charged / bankcrupted..the few lawyers that will come forward, you know, I know, who are the handful..(despite Sylvia's remark at IBA that they don't have problem finding lawyers, the actual situation is, SG lawyers don't have the guts like our M'sia counterparts..)
This is something we all need to really learn from M'sia's opposition.