Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم is such a big crime due to which all the good deeds are lost.

Hakeem-ul-Ummat, Mufti Ahmad Yar Khan رَحْمَةُ اللهِ تَعَالٰی عَلَيْه has stated: The courtly manners of worldly kings are manmade, but the manners of the blessed doors of the Beloved Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم have been made and taught by Allah عَزَّوَجَلَّ, furthermore, these manners are not only for humans but they must also be followed by all jinns, humans and angels. Angels also used to visit his residence after seeking permission; these manners are in place forever. (Noor-ul-‘Irfan, pp. 823)

تِرے رُتبہ میں جس نے چون و چرا کی       نہ سمجھا وہ بد بخت رُتبہ خدا کا                   

Dear Islamic brothers! All the Holy Prophets عَـلَـيْـهِمُ الـصَّلٰوةُ وَالـسَّـلَام are respectable and deserve reverence. Allah عَزَّوَجَلَّ has commanded (us) to observe reverence for the Holy Prophets عَـلَـيْـهِمُ الـصَّلٰوةُ وَالـسَّـلَام in different places of the Holy Quran and has also made a promise of favours and blessings to those who obey these commands. It is stated in verse 12 of Surah Al-Mai`dah, part 6:

وَ اٰمَنۡتُمۡ  بِرُسُلِیۡ  وَ عَزَّ رۡ تُمُوۡہُمۡ  وَ اَقۡرَ ضۡتُمُ  اللّٰہَ  قَرۡضًا  حَسَنًا  لَّاُکَفِّرَ نَّ  عَنۡکُمۡ سَیِّاٰتِکُمۡ    وَ  لَاُ دۡ    خِلَنَّکُمۡ    جَنّٰتٍ    تَجۡرِ یۡ    مِنۡ    تَحۡتِہَا  ا لۡاَ نۡہٰرُ  ۚ

Translation from Kanz-ul-Iman: And believe in My Noble Prophets and respect them, and lend an excellent loan to Allah, I will surely forgive your sins, and I will surely admit you into Gardens beneath which rivers flow.

(Part 6, Surah Al-Mai`dah, verse 12)

After having faith in the Beloved Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم, in particular those who have reverence for him are blessed with the good news of success. It is stated in blessed verse 157 of Surah Al-A’raf, part 9: