"Anti-national slogans are raised in universities and when action is taken against such acts, it is said that the freedom of speech of the people are breached upon," Joshi said at a protest march here.
"This is a conspiracy and a planned strategy of the Communists. And it is our responsibility that their planned strategy should not get successful," he said.
His remarks came days after Delhi University witnessed large-scale violence.
The march was organised against the alleged violence against BJP workers and Sangh outfits in Kerala.
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Meanwhile, senior BJP leader V Murlidharan claimed that the violence against BJP workers and Hindu outfits are on the rise.
"18 political murders were reported in the state... BJP is ready for an ideological fight with them. But they cannot fight a ideological fight and hence are resorting to violence," he added.
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