As a founder and member of a multicutural organization, I take personal offense to the suggestion that any organization is not "traditional" or that it needs to be in existence for a particular amount of time for it to be considered worthy of respect. I'm not sure how you were pledged into your current organization, but my personal belief and way of training new members is to respect the contributions and efforts of every Greek organization regardless of where or why it was founded. As a founder, I know how hard it has been for us to thrive on campuses, and I know that if not for the help of other Greeks we would have a much harder time. (shout out to AKA, A Phi A and DST) I would suggest to those out there who don't have this perspective that you need to take a closer look at your organization's history and recognize that without the help of people in other organizations and sometimes outside or Greek life, your organization may not have survived to this point.
Remember: no matter the letter, we're all Greek together.
Peace and Blessings