>>24856732
If we say that Lenin did not do it (which is somewhat fair but still debatable), then Kerensky most definitely did not do it. Specifically Nicolas was done in by a military leadership clique, with the Petrograd Soviet activity as a justification for their actions. Those guys get the first credit on overthrowing Nicolas specifically - Ruzski, Evert, Sakharov, Alexeev, Brusilov, nepenin, etc etc. Duma was rather passive and useless as far as forcing Nicky to abdicate, and Kerenski was not a party in the abdication plot from the Duma - and even those Duma and government members who were involved did basically nothing and got nothing of what they wanted, hence all of them GTFO immedeately afterward, and Kerensky ending up in the limelight of democratic consensus and, much more importantly, foreign powers. He himself learned of the whole thing post factum. At the same time, his participation in the Petrograd Soviet was directed wholly and entirely towards neutering it in favor of empowering Duma and Provisional Government, and he not only did nothing to contribute to the protest and strike activities organized by the Petrograd Soviet, he opposed most of them.
Post-February, the created power vacuum (which Kerensky and Co failed to fill utterly and completely) left a lot of consideration for maintaining and/or reforming monarchy and the Romanov dynasty itself, just without Nicky. Kerensky did nothing to support or dismantle those, he and the the rest of Provisional Government overall did nothing at all beyond holding on to the illusion of power that they had, which was shaken nearly every day by every which general, garrison commander, protest, strike or gangster who felt like it. The only legitimacy it had came exclusively from the Entente powers recognizing it (and kinda sorta actively working to control it), Petrograd Soviet and Bolshies tolerated the Provisional Government only as far as they expected the Constitutional Assembly to just pass all this legitimacy to them no questions asked. Once that did not happen, Bolshies blew away the PG basically by sneezing, with the subsequent struggle for control unfolding between the real powers in Russia - Bolshies, remnants of the old Imperial army and their supporters including foreign Entente powers, and various local opportunists. Which was the event that acted as a definite curtains down on the Romanov dynasty's last aspirations to retain any sort of relevance.
So overall, Kerensky's involvement in overthrowing Romanovs can be described as limited to what his complete and total incompetence and helplessness achieved by making it easier for Lenin's gang to double-tap any remaining chances to install a Romanov as at least a constitutional monarch.