I have a team of almost ten people, allotted by an institution (college). A person from the team (say PS) always used to stay with another team and is almost disconnected from us.
Remaining nine people have hateful feelings towards PS. The hatred is not solely due to his smaller participation to the group, but also based on his conduct inside and outside the institution. He exhibits PDA, complains on friends to higher authorities, visits bad places (culturally), uses people for his own interests, etc.
We all, as a team, went to a trip twice, after our final exams, for recreational purposes. During the first trip, people invited PS and he came. But during the second trip, people intentionally avoided PS. Many times, people even forget to call and invite him for team events such as birthday parties, etc.
Currently, I am planning the third trip with my team. I'm afraid the spirit of the trip may get spoiled if I also invite PS. However, it will be impolite to not invite PS for the trip.
Some among remaining nine people are advising me to not invite PS so as to ensure we have a good trip.
I want to invite PS because he is an inherent part of the team and we, as a team, should not feel negatively about our decision afterwards.
Although they respect my decision and come to the trip, I have a strong belief that they may not enjoy the tour if PS comes. What should I say to them on my decision despite of the hateful feelings of the group towards PS, without spoiling the spirit of the tour?