Based on my experience in the US the use of the specific label "leftist" is generally used on people who support policies that are common in much of the liberal world, so coalescing "leftist" with people who promote killing people is a pretty gross choice. Do you want to reconsider your phrasing? Especially given you then say you disagree with surveillance because of "simple beliefs or religions" which is directly in opposition to "surveil all the leftists".

Also, I'm German, so I mean people like this for example: https://en.wikipedia.org/wiki/Red_Army_Faction There are plenty anti-state leftists group, even in the US. And you probably very well know it, so I'm kind of annoyed at your question tbh.

> Do you want to reconsider your phrasing? Absolutely not. Leftist means in support of left politics. You imply that the political left has no extreme wing this way. Same as with muslims, there's a range of beliefs, and a subset of those groups are not ok.