They seem to be judging you as an inferior human being,
if they are not attending meetings, they may have issues that are being torn apart in their lives by the very elders they loved. time is a test of all things.
YES you should have greeted them. but you got a result, learn from that result.
If you knew they are not attending meetings, the next comments were reasonable.
their reaction is the negative but are you aware as to why they are so hostile.
Did they do something against you, maybe that you are NOT aware of?, their reaction is strange unless there is something between you guys that you are, or are not aware of.
Many times brothers that you think are loyal actually go to the elders behind your back and tell on you!, maybe they have a guilty conscience and that causes them to display this expression of rejection towards you.
Have they heard something about you they is really outrageous that would cause them to have this contempt.
You seem to think they should be your friends. This is an error on your part.
Really in the kingdom hall as a devout JW count on your hand the people that are your true friends. and you get more than 10? - probably not.
When you are out of the org, count again, only then will you know whom is true friends. they chose not to be your friends regardless of situation. Respect that!. it might hurt you, but SHUN THEM! as though they don't even exist. They might be hurting a lot more than you realize and for reasons you have no idea about.