[tick_tock_tick]

Purity tests are extremely common in left wing politics in the USA.

[imtringued]

And the point of the purity test isn't to establish guilt. You're already declared guilty and the purity test is an attempt at finding or creating evidence of your guilt.

[ndsipa_pomu]

I wasn't aware that there is a left wing in USA politics. The view from an outsider is that you have extreme right-wing and a fascist right-wing.