Have you ever stopped to realize a Constitution can be wrong? A Countries Constitution is a law like any other, and like all laws it is going to be flawed in some capacity. The only thing that makes it unique is that everybody has agreed upon the method upon which it can be changed, a method that is much more than the requirements of any other law (for good reason).
Laws can be wrong and usually when they are wrong they are eventually fixed. Many countries in the past have done it and continue to do it. Ireland did it in 2015 when they amended their constitution to legalize same-sex marriage, a provision that was initially written as illegal in their constitution.
The point is, there is nothing magical about a country's constitution. Like with Irelands having banning Same-Sex marriage before amendment, constitutions can be wrong and the USA Constitution definitely has its fair share of things that need to be fixed.
In my 20 years of being online and interacting with Americans, I can tell you that a huge portion of people do think one of 4 ways.
1. That the constitution can't be changed (despite the fact it has been, but hey, who the hell knows what they teach in schools)
2. That it's infallible like the founding fathers what was good in 1788 is good in 2017 (raising them to some sort of godhood)
3. It can be changed but it's too hard so why bother.
4. Hey it actually is a living document, the founding fathers were humans and made mistakes (and a lot were assholes) and we don't need to be tied to the past (very very few people make up this option).
Take your pick cause that's all I've really seen.