Two unforgivable sins?

jesus said blasphemy against holy spirit is unforgivable. look at 2 chronicles 7:19-22. throughout the old testaments, idolatry seems unforgivable. for this reason, the king david(despite his adultery & murder) is blessed by god. for this reason, the king solomon did was not as much blessed as his father king david. blasphemy is just like a treason to the kingdom of god while idolatry is like a defection. what do you think?