Loving Allah necessitates that the believer put full trust in him and loves all that he learns of what Allah has commanded and forbidden. Therefore the true believer loves each and every aspect of Islam and he loves those others who likewise do so. Submission which negates Disobedience. And turn in repentance to your Lord and submit to Him in Islam. Acceptance which negates Rejection or Denial.
Partial acceptance is like no acceptance at all.
This second part of the testimony of faith is no less important than the first. It is impossible for one to be a true believer in the first part without also believing in the second. But no, by your Lord, they can have no faith, until they make you judge in all disputes between them, and find in themselves no resistance against your decisions and accept them with full submission. Believing in all those matters he informed us about. Allah has spread His light all over this earth and surely in such a dark place as the world can at times be, there is nothing more needed than a beacon to show us the way .