2 kinds of people.
1) There's people who only need to see what drugs do to addicts. And that's good enough for them to decide that drugs isn't the life they want for themselves.
2) And then there's people who need to hit rock bottom in the depths of addiction, destroying themselves and possibly everyone around them, for it to finally click in their heads that drugs isn't the life they want for themselves.
This same analogy can be applied to conservatives and liberals in the USA.
1) Conservatives only need to see what the massive influx of savage, angry refugees have done to Europe. And that's good enough for them to decide that a massive influx of savage, angry refugees isn't what they want for their country.
2) Liberals would much rather prefer to make that decision after a massive influx of savage, angry refugees have already destroyed their country for themselves and everyone around them. And instead of sleeping in the bed they made, they want to escape the situation and leave everyone else around them to continue suffering.
Case in point, so you'll know I'm not making this shit up:
A recent news story
"German Refugee Worker Admits She Was Wrong, Plans to Move to Poland - "It’s too late for Germany”.
And here's a guy commenting on that bizarre situation.
https://youtu.be/ZAgm4mdukc8