If you invite them into the Guidance, they will not follow you, it is the same upon you whether you call them or you keep quiet.
Today, if the believer is calling the Fujjar into the Guidance Adhikr, they will not accept it. So it is the same whether the believer calls them into the Guidance or keeps silent, the Fujjar will never accept Adhikr. They have made their food 'rejecting Adhikr' as explained in verse 7: 26. They are the Mujirims and wrongdoers as explained in verses 7: 40-41. It is told in verses 36: 10-11 that it is all the same for them whether you warn them or not, they will not believe. Indeed, you will only remind the one who follows Adhikr. Fujjar are considering the other people belonging to Messenger's community as Kafir and Mushrik. But for the other people if they believed in Lord and the Last Day and do honorable deeds, they have their reward with their Lord, and there shall be no fear upon them and for them will not be grieved as explained in verse 2: 62. See explanation 1: 7; 2: 6-7; 4: 140; 9: 28 and 95.