"The Two Perpetrators of Religious Fanaticism who are destroying Social Fabric of this Country. Image sent by a friend," Singh had posted on the social networking site yesterday along with a photo showing Owaisi's half face with the other half of RSS chief Bhagwat.
The Majlis-e-Ittehadul Muslimeen chief reacted sharply to the tweet and called it an "insult of Muslims", while Union Minister and BJP leader M Venkaiah Naidu said the Congress talking of secularism was like "devil quoting scriptures".
On the other hand, Naidu slammed Singh for putting Bhagwat's picture along with that of Owaisi's, saying the Congress leader should not be taken seriously as the people of the country have already rejected him and his party.
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He also accused Congress of promoting casteism, communalism and regionalism.
In another tweet, Singh today condemned "laathicharge on saints" in Varanasi during Prime Minister Narendra Modi's visit and asked the RSS and VHP to seek apology.
"I strongly condemn the merciless lathicharge on sadhu saints of Varanasi during Prime Minister Narendra Modi's visit there. Sangh and VHP should seek public apology from saints," he said on Twitter.