What is the meaning of posting a picture insulting RSS during `Bharat Jodo` Yatra?

To strengthen the Congress party, Rahul Gandhi is taking out 'Bharat Jodo' Yatra in 12 states. During this visit of Rahul, a tweet was made from the Twitter handle of Congress. Now Congress and BJP are face to face on the same tweet. Congress tweeted a photo. In this photo, the RSS dress is seen on fire.