Is Obama an Existential Threat to the USA?

-
I know that may sound kind of alarminst, but I was thinking about this and just had to verbalize the question:

"Is Obama an existential threat to the USA? If Obama becomes President, will that threaten the existence of America?"

Consider the following:
- Attended the church of Jeremiah Wright for 20 some-odd years. Jeremiah Wright, who made famous the quote "God damn America."
- Friends and co-worker with William Ayers. William Ayers is co-founder of Weathermen, a domestic terrorist organization. Obama calles Ayers "respectable," "mainstream," and "just another guy in the neighborhood."
- Accepted more contributions from Fannie Mae and Freddie Mac than anyone except for Chris Dodd. Accepted these contributions in little over 3 years, whereas Chris Dodd took 20 years to accept more contributions. Fannie Mae and Freddie Mac are arguably part of the main reason for our current economic crisis.
- Former CEOs of Fannie Mae, Jim Johnson and Franklin Raines are advisors to Obama.
- Former member of Davis, Miner, Barnhill & Galland, a law firm that sued banks to pressure them to give sub-prime loans.
- Member of ACORN, a community organizing group that consistently practices voter fraud and "direct action" activities such as storming board meetings of banks to pressure them to give sub-prime loans.
- Received campaign contributions and participated in questionable financing deal with convicted felon, Tony Rezko.
- Voted to cut off funds to troops.
- Voted 4 times to not allow medical help to infants who survice abortions.
- Endorsed by Hamas.
- Willing to sit down with Mahmoud Ahmadinejad without pre-conditions, but is unwilling to appear on Fox. (UPDATE: I forgot about the appearance on Bill O'Reilly's show. Thanks Dawn!)

These are just the things that I know of. I'm relatively well informed, but by no means an expert. These are just the things I could think of off the top of my head. I'm guessing there is more out there that I am not aware of.

Obama has demonstrated a willingness to associate himself with people who are clearly enemies of the United States. He demonstrates a threat to America on an economic level, a philosphical level, a military level, a social level, and a cultural level. It seems that in every measure, the man just wants to harm the United States.

Imagine if he gets elected and the likes of Nancy Pelosi and Harry Reid are in charge of congress. With the only opposition from a minority in congress, he will be able to implement much of his radical, left-wing, downright dangerous agenda. That, too me, constitutes an existential threat to America.