When business partnerships go bad, very often someone wants out. That starts one of two possible processes. The business enters Wind Down and begins the process of closing or the partners start discussing a Buyout.
Unless you are in some sort of political business, you should keep politics out of your establishment completely. Of course, you have freedom of speech, but we are in very contentious times and displays of political or religious positions might be off-putting to to your customers.
Before we found ourselves in this terrible mess, many businesses had partnership issues. If your partnership has problems, now is the time to deal with those things that cause tension.