Maharashtra Navnirman Sena (MNS) president Raj Thackeray on Sunday asked the Congress and BJP to stop maligning national icons like V D Savarkar and Jawaharlal Nehru and instead focus on important issues facing the country.

Addressing party workers at a convention here, Thackeray said criticising national heroes who fought for Independence was unwarranted as everyone has "positive and negative aspects".