Evidence? 30 odd years of riding on/off road with said type of folk a good start?
Patterns and even stereotypes emerge with enough data.
Data is the key, along with objective analysis.
While there are single focus zealots I'd be surprised that there are enough well connected angry dog walkers to be that influential in environmental policy. That there are people prone to that mindset and feel compelled to apply it to other areas that they have issue with, like cyclists, I'd agree.
Looking at the UK and USA recently, I'm not sure about "Product of geographical environment socially specific to Australia." as an explanation for our social or political behaviour.
Having said that, society and politics is currently being overly influenced by easily presented but unsubstantiated (generally emotion based) subjective opinion (climate change, vaccinations, immigration, racism, gender equality, terrorism for a start ).
Agree with your post (#8999).