I don't understand why you think your birth circumstances determine your values.
By your logic, if your parents had moved to Germany or the UK when they were one, grew up there and indoctrinated you in the glories of those countries they wouldn't necessarily be a threat.
On the other hand, if your parents left Germany and decided the US was a better place to live, emigrated here and raised you to love this country you're still unreliable by virtue of German law which says you're a citizen.
You're letting German lawmakers determine who's eligible to be President.
I don't follow your logic there at all. Obama was just such a person; raised in a foreign country. Regardless of his parentage or citizenship he didn't belong in the White House.
I certainly do question the loyalty of Obama. I expect the President to put America first. I don't think Obama did. I think similarly about Supreme Court Justices who think their job is to shop for a better constitution in foreign nations when it is their job to preserve, protect, and defend ours.
Natural Born Citizenship, as I would define it, is not a guarantee of loyalty, It is simply a filter for the most obvious source of problems.
I see the Natural Born Citizen requirement as being very similar to "conflict of interest" policies at companies for which I have worked.
Years ago I worked as an engineer for a group which had a very expensive system which needed an expensive, heavy repair part. At the time there was a nationwide shipping strike going on. It seemed like it was going to take forever to get our system back up.
As luck would have it, I had a brother who worked in the freight business. I told my boss that I thought we could use him to find a way to get the part.
Because my brother stood to profit from helping my company I was very careful to inform several levels of management about what we proposed doing so that I wouldn't be accused of impropriety later.
I have explained to people over the years that "conflict of interest" doesn't mean anybody did anything wrong. It simply means that the conflict must be managed properly; as I did.
Having parents born in a foreign country creates a conflict of interest for a President. It doesn't mean that the person did anything wrong. It doesn't mean that the person is or would be disloyal. It simply means that there is a conflict of interests.
The "management" of our country is the Constitution and the Constitution manages this particular source of conflict of interest by excluding people with such a conflict from holding the office of President. Just that one office. I don't see anything unreasonable about managing the situation this way.