The secular side, being more open-minded and tolerant, will simply dismiss this call to the Quran as antiquated, outmoded and irrelevant. Many secularists will simply not consider it. One cannot be discouraged by the prospect. It is part of the social struggle to expose falsehood and confirm the truth. The secularists will be worthy opponents since they will be prepared to fight it out in open battles.
Open debate is part of their secular tradition.
The traditionalists are a different breed. Open debate is not part of their tradition. In fact, they came into being in Muslim society by killing open debate. Authoritarianism is their culture. Thus, slander, threats and falsehood will be their methods.