Sorry to hear about the drama!
I think that you should not let the members on your campus up set you so. Look at the big picture. There may be a reason why they feel the way they do. I think you should still attend events and definately not say anything to ANYONE about you feelings about the members on your campus. If all else fails- you can always try grad.
I went through something similar- Once I attended an event attitudes changed and people were not friendly. I did not get up set after thinking about it. I felt bad that letters could make some one so mean........
It was not me- It was common on my campus- I will leave it at that
Adopt a positive attitude- you never know