I'm sorry you are in such a stressful situation. As if nursing school
is not hard enough already.
First I would recommend that you stay away from all of the gossip. The instructors and staff know who is "yelling at them in class", forwarding e-mails and causing the disruption. If you are not one of those people then don't get involved. It's easy to get drawn into other people's drama, but you will be best served by steering clear. You stated that you don't have the full story, once again if it does not involve you, stay clear. It is not your job or responsibility to "stop the chaos", unless once again you are initiating it.I'm sure you have an advisor assigned to you through the school, this is a good person to approach with your concerns and advice.
As fas as recommendation letters, I suggest collecting those throughout your clinical experience from clinical instructors. They see your talents and skills on the floor and IMPO write the best letters.
Good luck and once again don't get sucked into drama others create. By focusing on yourself and doing your personal best you will rise above the troublemakers.