The party said it was defamed across the world and Prime Minister Narendra Modi was projected as a "villain" even though Akhlaq's murder was a failure of the Uttar Pradesh government.
"The court has ordered registration of an FIR. Law will take its own course. We have condemned Akhlaq's murder and are against any sort of violence. But the incident was used by some so-called intellectuals to defame BJP and the country in the world. Modi was projected as a villain.
Akhlaq was killed by a mob on September 29 last year on the suspicion that his family had stored and consumed beef at their home.
A court has now ruled that an FIR be registered by police and his family be probed for allegedly slaughtering a cow, a crime in Uttar Pradesh. The family had earlier denied the charge.