First I'll say that surveillance is a consensus among people in power no matter how you slice it. It is, depending on your perspective 1) about governments expa

First I'll say that surveillance is a consensus among people in power no matter how you slice it. It is, depending on your perspective 1) about governments expanding government power, something the powerful in government always want or 2) about defending against terrorism, something everyone wants. I'll give you my perspective on your question as someone fairly left of center, so take it with a grain of salt. Or take it as God's truth, whatever you fancy. People, inevitably inexorably being strangled to death by the neoliberal free market capitalist economic system which has controlled nearly every western government since the 80s, are struggling and striking out for anything that will save them. People often turn to extremism and fascism of all stripes in situations like that. They become more extreme, because the status quo is a slow and painful death so anything that seems like it will bring change is good. When you are drowning you don't worry too much about the kind of boat that's offering to pull you up, you just climb onto it. Even if that boat is a slave ship. Leftists have seen some success recently when they drop the ridiculous affectation of 'reasonable centrism and compromise' (centrism is only ever reasonable to people for whom the status quo is working, almost by definition), stop focusing on race/gender to the exclusion of class, and present real, radical, explicit and understandable changes to improve the lives of voters: Corbyn, Sanders, even Melenchon have all had encouraging and very high levels of success relative to expectations and the recent past, though they are mentioned in the order of their absolute success (Corbyn, topping the list, won a huge number of seats, the largest increase in labor vote share since 1945, caused a hung parliament which is pushing the Tories to make an uneasy alliance with an extremist group). But these movements are still beginning and have a lot of work to do; they diametrically oppose the entrenched order explicitly (for the ultrawealthy, a Muslim ban is gauche and unbecoming of their senses of civility and properness; nationalizing private industry to take it from robber barons or providing healthcare for the poor is a very assault on their power/way of life), so they receive no support from above.