What our so-called radical opposition is popular for among majority of Russians:
1. Their leaders were "running" (if you even can name it that way) a country in 90s that was utter failure, as other comrades have already pointed out.
2. Their leaders and other media-persons erupt with abusive tirades in their media outlets (echo-msk, dozhd, live-journals, blogs, twitters and facebooks) aimed at...Putin? No - Russian people. Really, the electorate they should cherish, make them change their mind, enlighten, if they want to change things, instead is named as bydlo (chavs), anchovy, flies, subhumans, worthless scumbags, genetical waste, call Western world to nuke shit out of Russia, etc, etc, etc. With this kind of rhetorics they wanna reach people's hearts?
You know, they do everything to not be listened to, voted and elected. This kind of behavior makes me think in conspirological way about them and suppose that they actually are on Putin's payroll, lel. Wise strategy indeed - you let them bark and spew hatered so noone will vote for them, but still let them occupy radical opposition niche. Profit!
So, this murder is much probably is a removal of one of the best of Putin's agents, lol. Probably someone wants to get radical oppostion going forward.