People should use better sources and call out the ADL when it's used but they're right on this. This information predates their current madness.
The SPLC's information is, unfortunately, nowhere near as comprehensive but they also list it. As does Wikipedia.
Anyone using "Austria 88" knows exactly what they're doing. No way you put that together by chance.
I think the crisis technically started with a military invasion. If not that, then we could go back and forth on this to the founding of NATO and before.