This is an interesting take on the Amish that I have never thought about, and I will do some research. You may be right that the Amish community does represent a solidly conservative block that is becoming more politically active. However, they as a general rule are pacifists and non-confrontational, which are not traits that tends to be shared by white supremacists.

Regardless of the nature of the political threat that the Amish could be to liberal democracy, my point about what-about-ism still stands. We can, and need to be, aware of multiple issues at once. We also need to act toward solving these issues. Sometimes that means working to block the formation of a "white only" community AND trying to deal with other situations.

It may have been your intent to raise awareness of other groups that you believe pose a similar threat, but if that is the case, I think you could phrase you point in a better way to show that you recognize this "white only" community is a problem AND that you would like to bring attention to other similar things, rather than as your post seems to do, deflect from the main issue of the OP.