Do note that XS4ALL is owned by KPN, which is a monolith like Comcast or Verizon. If the authorities come knocking hard enough, KPN will make sure it it shut down, or worde. XS4ALL is a good provider, I enjoy my IPv6 and fiber to home very much, service is good, they still provide a shell server which I use for IRC, I like them
Sad as it might be, I have to agree with you. Upon acquisition, KPN said it will let XS4ALL be as independent as possible, and as far as I can tell, they put their money where their mouth is (let them fight court battles, where KPN (the ISP) does not), but if there is little legal room for XS4ALL to move in, KPN will make sure XS4ALL complies.
On the other hand, XS4ALL is always looking for the boundaries of privacy and free speech -- if there is no more (legal) room left, and as such have reached the boundary, I have no doubt they would comply. But they probably make a big stunt out of it again, using it as a marketing opportunity, which KPN, of course, will have no problems with. As long as they comply with the law.
I do however have my doubts about KPN...