There may be an increase in numbers for those that would now be okay with more surveillance, but probably not very significant. I bet there are a lot more politicians who are now ok with it, though, and they will try to sell it to the population as the "solution" to stopping terrorism - even though, once again, they
knew who the guy was, and they could've used a regular warrant to wiretap him.
What pisses me off the most is that after all of these events, it seems nobody from the intelligence community ever resigns or gets fired. Because, of course they must've done their job "flawlessly", and you can't blame them. It's everyone else's fault but theirs.
I hope they won't push for too much besides more public surveillance, though. Because I think the EU could become more of a "safe haven" for US tech companies that want to flee a US government wanting to backdoor encryption or demand that they don't use end-to-end encryption for their services. That could really pay off for the EU economically, in the long term.