Senior BJP leader and Union minister Ravi Shankar Prasad condemned the "malafide comments" on the "regrettable and unfortunate killing" of the journalist-activist.
Various party leaders, he added, had spoken out against the murder.
Showing copies of news reports of Lankesh's brother, Indrajit Lankesh, claiming that she had worked for the surrender of Naxalites, Prasad asked why the Siddaramaiah government had not provided her security.
It had also been said that Naxalites were unhappy with this. "Why was there such a security failure by the Congress government in Karnataka?" he added.
More From This Section
Taking on Cong Vice President Rahul Gandhi, Prasad asked why he had not questioned his party's government in the state.
Rahul has already blamed RSS wing groups for killing the journalist, Prasad said. How then could a fair probe be expected from the Congress government in Karnataka, he added.
"Why is that all my all liberal friends who speak so eloquently and strongly against the killing of a journalist... maintain conspicuous silence when so many RSS and BJP workers were killed in Karnataka and Kerala," he said.
RSS and BJP workers are also entitled human rights. This hypocrisy and double standards need to be exposed, he added.