Is sincere repentance possible for mocking religion and reviling the Prophet or God, with the intention that God may grant the Muslim a normal life far from disbelief?

Repentance is accepted for every sin, even disbelief (kufr) and apostasy (riddah), and the one who repents from a sin is like one who has no sin. So, whoever repents with sincere repentance, Allah will accept his repentance and grant him a good life in this world and the Hereafter, as long as he remains steadfast upon Allah's law. There is no harm in the intention to repent. If these thoughts are mere whispers (waswasah), then one must strive against them and not succumb to them.