A Facebook post by Kaur had gone viral last week. In the post, she holds up a placard saying: "I am a student from Delhi University. I am not afraid of ABVP. I am not alone. Every student of India is with me. #StudentsAgainstABVP".
Her post had come after violence on Delhi Univesity's Ramjas College campus by students of the ABVP, the students' wing of the BJP.
The ABVP students had forcibly shut down a seminar at Ramjas at which the JNU student Umar Khalid was to speak on Bastar, the subject of his PhD.
Khalid had last year been charged with sedition after allegedly anti-national chants were raised on JNU.
Meanwhile, Kaur has been provided security -- two women constables will now be stationed with her -- after she alleged rape threats online.
Sehwag had earlier today mocked an earlier video of Kaur's, in which she holds up a placard saying: "Pakistan did not kill my dad, war killed him."
Gurmehar's father, Captain Mandeep Singh, had been killed in the 1999 Kargil war.
Sehwag replied to Gurmehar's video by holding up a placard of his own which said, "I did not score two triple centuries. My bat did."
Sehwag's tweet was retweeted by actor Randeep Hooda, who later said she was being used as a "political pawn".
In similar vein, minister of state for home affairs Kiren Rijiju had earlier tweeted: "Who’s polluting this young girl’s mind? A strong Arm Force prevents a war. India never attacked anyone but a weak India was always invaded."