A hispanic support group is not a particularly unbusiness like idea. If it helps integrate hispanic workers into the working enviroment, encourages inclusivity and comraderie…then that’s very good for the working enviroment and productivity. Same with a rainbow flag. Reducing a toxic atmosphere in general is extremely good business sense especially in a large office. I don’t see the problem with a bible quote if EVERYONE is a believer. However, I can’t think of any particular reason to put a religious quote on the wall, when you can find a perfectly good substitute that doesn’t create tensions between the people of different religions. If you want to express your religion you can wear a cross around your neck or put a Jesus doll on your desk.
I believe a business has a right to require a businesslike atmosphere. And if that’a a value to them, they need to observe it, too.
A Hispanic support group can meet off premises on their own time, and probably should. If all else fails, workers who feel oppressed can always take extreme work actions like strikes…or work elsewhere.