I'm horrified, I'm worried that they're going to cause massive damage to the brand of my company and I feel terrible that the company I built is now part of a message I find truly vile.
As a founder what can I do? Most of the VC industry seems to be on the wrong side of this issue so it feels like speaking up will lead to a blacklisting (c.f. what happened to Paul Graham when he simply posted the number of dead civilians on both sides).
Tell your board members to do what other famous people do when they want to vent and shitpost on Twitter: create an anonymous burner account and have fun going buck wild with no trace back to you.
If he took your position on the matter and was similarly vocal, would you have the same concern?
As far as blowback to your brand because you did not support the "right" side, it seems that we are ending up in a position where even a neutral side is taken up as being part of the other side.
All you can do is acknowledge the loss on "EACH" (read, not "both") side. And acknowledge the turmoil on each side. And acknowledge the human struggle (not war struggle) on each side. And acknowledge the polarization of 'both' sides.
And then stress to look forward to the end of the conflict.
Plus, also tell your board members after you have made this post clear, that posting messages opposite to the position of the company via profiles that lead back to the company will be taken as to be in conflict with the values of the company.
If he did, post a quote. If he didn't, you shouldn't be treating him as if he did.
And my bet is heavily on the "he didn't" side.
The corporations is not a machine to optimize for personal views of the founders, unless there are no other shareholders, or unless all the other shareholders are in agreement (something that might be impossible to achieve when amount of shareholders crosses certain threshold).
In other words, if you are accepting outside shareholders into your company, you are no longer allowed to make any decisions for any other reason than profit, not unless other shareholders would consent to it. This is the law.
However, as a shareholder, you have the right to choose who you would like to have on the board, for any sort of arbitrary reasons.
Granted there are red lines where maybe you just don't want to be involved. But keep in mind every company, startup and set of investors is going to have people coming down on both sides of the many issues everyone is dealing with today.
I try to be positive and keep an open mind and not get involved in sharing my opinions on hot button topics in my business life. It's a tough world out there right now.
If I had a dollar for every coworker or business partner I ever had a disagreement with...
You don't have to agree with his politics.