Velingkar, a regional language crusader, floated the GSM ahead of the assembly polls in Goa earlier this year to take on the BJP, attacking the policies of the government led by it.
The GSM has fielded its president Anand Shirodkar against Chief Minister Manohar Parrikar in the Panaji by-election scheduled on August 23.
The rebel RSS leader was relieved of his charge as Sangh's Goa chief,following which he floated a parallel outift.
"Though the RSS workers who backed him had gone back to the Sangh they still support the GSM, which is a political ammunition to fight the issue of medium of instruction in mother tongue," Velingkar told PTI.
He said the BJP does not have its own cadre in Goa.
"There are several reasons why they don't open up in public, one reason is that they are afraid though their fear is unwarranted. The true BJP cadres have reduced," Velingkar added.
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