He also warned party leaders to refrain from making any statements which may hurt sentiments of any section of the society.
"C.P. Joshi's statement is against the ideals of the Congress party. Party leaders should refrain from making any statement which may hurt any section of the society," Gandhi said in a tweet in Hindi.
"Respecting the principles of the party and sentiments of its workers, Joshiji would definitely realise his mistake. He should express remorse for his statement."
Joshi apologises:
Following Gandhi's statement, C.P. Joshi on Friday apologised for his remarks. "Respecting the ideals of the Congress and the sentiments of the party workers, I express remorse for my statement if it caused any hurt to the sentiments of any section of the society," he said in a brief statement.
Gandhi's remarks came after a video of Joshi surfaced on Thursday in which he is heard saying that only pandits and brahmins knew about Hinduism and were learned enough to speak about it.
"Does anyone know what is the caste of Uma Bharti? What is the caste of Sadhvi Ritambhara? In this country, if anyone knows about religion, it is the pandits and the brahmins," Joshi is heard saying in the video.