I thought we were suppose to treat them this way -- Isn't this what Christ commanded?

(NWT) Luke 15: 1 Now all the tax collectors and the sinners kept drawing near to him to hear him. 2 Consequently both the Pharisees and the scribes kept muttering, saying: “This man welcomes sinners and eats with them.” 3 Then he spoke this illustration to them, saying: 4 “What man of ​YOU​ with a hundred sheep, on losing one of them, will not leave the ninety‐nine behind in the wilderness and go for the lost one until he finds it? 5 And when he has found it he puts it upon his shoulders and rejoices. 6 And when he gets home he calls his friends and his neighbors together, saying to them, ‘Rejoice with me, because I have found my sheep that was lost.’ 7 I tell ​YOU​ that thus there will be more joy in heaven over one sinner that repents than over ninety‐nine righteous ones who have no need of repentance.

I now wonder if we Do Not show love, does it mean we are Nothing when it come to being the truth? Just asking with these scriptures in mind how can we treat ones who are disfellowshipped like we do? Please answer with these scriptures in mind. I am very confused.

(NWT) 1 Corinthians: 1 If I speak in the tongues of men and of angels but do not have love, I have become a sounding [piece of] brass or a clashing cymbal. 2 And if I have the gift of prophesying and am acquainted with all the sacred secrets and all knowledge, and if I have all the faith so as to transplant mountains, but do not have love, I am nothing. 3 And if I give all my belongings to feed others, and if I hand over my body, that I may boast, but do not have love, I am not profited at all.

4 Love is long‐suffering and kind. Love is not jealous, it does not brag, does not get puffed up, 5 does not behave indecently, does not look for its own interests, does not become provoked. It does not keep account of the injury. 6 It does not rejoice over unrighteousness, but rejoices with the truth. 7 It bears all things, believes all things, hopes all things, endures all things.

8 Love never fails. But whether there are [gifts of] prophesying, they will be done away with; whether there are tongues, they will cease; whether there is knowledge, it will be done away with. 9 For we have partial knowledge and we prophesy partially; 10 but when that which is complete arrives, that which is partial will be done away with. 11 When I was a babe, I used to speak as a babe, to think as a babe, to reason as a babe; but now that I have become a man, I have done away with the [traits] of a babe. 12 For at present we see in hazy outline by means of a metal mirror, but then it will be face to face. At present I know partially, but then I shall know accurately even as I am accurately known. 13 Now, however, there remain faith, hope, love, these three; but the greatest of these is love.