The incident triggered sharp reactions from Congress as well as the Patidar Anamat Andolan Samiti (PAAS) whose members removed the garland after Vanzara had left the venue.
Vanzara, a key accused in the alleged fake encounter killings of Ishrat Jahan, Sohrabuddin Sheikh and Tulsi Prajapati, was in Surat to attend the rally.
Before the rally, he put a garland, having a pen and a toy pistol tied to it, around Sardar Patel's statue.
"It was Sardar Patel who had convinced more than 665 princely states to join the Union of India after independence. Though a majority of states got convinced ahnd acceded, some like Junagadh and Hyderabad raised their head in protest. In such a scenario, Sardar kept aside his pen and took up the gun," he said.
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Vanzara said the pen in the garland is a "symbol of wit", and the pistol of "power".
However, the incident drew criticism from various quarters.
Condemning the act, former Congress MP and Sardar Vallabhbhai Patel Memorial Society chairman Dinsha Patel demanded an apology from Vanzara.
"I strongly condemn such an act. I believe that whoever did this must apologise to the people of India," said the veteran Congress leader.
PAAS, fighting for the cause of reservation for Patels, also demanded an apology from Vanzara even as its workers removed the garland.
On April 8, Vanzara landed in Ahmedabad after the CBI court relaxed his bail conditions and allowed him to enter and stay in Gujarat. Since then, Vanzara has been felicitated by his supporters at such rallies in different parts of the state. He had also not ruled out joining politics.