I think YMMV here based on who you're around. If you're right-leaning in an urban setting or a coastal city, you'll find a lot of heterodox views. If you live in the Rural South or Rural Midwest and do not almost literally worship Donald Trump, you are shunned.
The opposite is true for the left and the Democratic Party. Those circles tend to be very orthodox if you live in a lefty urban area. Disagree with one major platform issue and you're immediately suspected. If you're in the suburbs or a rural area you'll find that left-leaning people are much more heterodox.
Purity spirals are most intense in enclaves, which are echo chambers.
You'll find the same phenomenon online with regard to echo chambers. If you're in a left or right wing echo chamber, the purity spiral phenomenon is intense.
The opposite is true for the left and the Democratic Party. Those circles tend to be very orthodox if you live in a lefty urban area. Disagree with one major platform issue and you're immediately suspected. If you're in the suburbs or a rural area you'll find that left-leaning people are much more heterodox.
Purity spirals are most intense in enclaves, which are echo chambers.
You'll find the same phenomenon online with regard to echo chambers. If you're in a left or right wing echo chamber, the purity spiral phenomenon is intense.