I believe that the comment was referring specifically to "Americans [that] allow this sort of thing then say they are a world leader in personal liberty", and I'm not sure how saying that there are other people in America is a relevant response.

The practice of civil forfeiture is being "allowed" by not doing anything about it or by giving it legitimacy by accepting it as something that should be reformed politically rather than treating it as a criminal violation of constitutional rights. Just because you get worked up about it for 15 minutes when reading an article about the injustice it causes doesn't mean that you aren't allowing it. Most people will unfortunately not even have a strong opinion about it until it happens to them or someone close to them.