1. Just because people have decided half a century later that Euthanasia is ok, somehow excuses the behaviour of the Catholic Church?
2. In essence you are saying that the Church is vulnerable to secular trends like any other organization?
There were a lot of medical and quasi-medical folks around in the 40s and 50s who thought it to be the sina qua non of ethical medical practice to sterilize American Indian women ~ that way you'd have fewer babies growing up to be alcoholics.
Then there were the folks who thought all stray Indian babies ought to be adopted out to loving white folks.
That worked ~ frequently the family would discover their daughter had some health problems and inherited differences that just didn't fit a pattern they could deal with.
Let me tell you, a castrated gay guy in the Netherlands is the least of the stories out of that place. Failure to properly evaluate the German physicians they let into the country post WWII is probably the source of more horror than you can imagine.
Not to protect the Catholics, but stuff happens ~ and nobody could have done anything about it because, frankly, they were in a pond with alligators up to their eyeballs at the time.
BTW, the Dutch medical community had already decided that euthanasia was OK decades before ~ it just took time for them to figure out how to weasle-worm their way into making it all legal.
Comparing and contrasting one horror with another is an exercise in futility when it comes to Netherlands and Belgium.