Ideally, whether someone signs that "community covenant" or not doesn't exactly make them a good or bad lawyer. As someone who knows people who go to TWU, their "covenant" is similar to the Terms of Service you hit "Yes" on when you power up a new phone or computer for the first time - largely ignored and is commonly seen as a formality.
If you don't want a lawyer that graduated from TWU, it's your choice not to have one. It's also your decision not to go to TWU and to another school whose moral/ethical/lifestyle code better aligns with your own. Moreover, TWU is a private university anyway, and as long as a significant part of my tax dollars doesn't contribute to the spread of ignorance and bigotry, and if I don't have to consciously rely on their lawyers in my personal life, they can do what they want. It's that simple.