I'm as "real" a Muslim as any other. In Islamic basic legal definition, a person who says he is a Muslim is to be treated as a Muslim. Period. Full Stop. Dot. To do so otherwise is a corrupt, modern, aberrant
un-Islamic practice that has flagrantly reared its head in the modern era.
The only Muslim capable of declaring a person(s) non-Muslim in Islamic law is a learned scholar and jurist of Islamic jurisprudence based on the apparent "behaviors" of that person or group, though scholars too have traditionally shied from doing so with the understanding that judgment is with Allah
SubnahAllah wa Taala (Glorious and Exalted is God) and only done so when conscience has prevailed on them to undertake this odious arduous task to prevent or warn Muslims of any aberrance to preserve orthodox Islam.
Also, being a Muslim is quite a simple matter, which comprises of first and foremost declaring or believing in God and the prophethood of Prophet Muhammad
sallalahu alayhi wasallam (peace and blessings be upon him) as part of the kharijites and also accepting the 6 pillars of iman (faith).
Also, just as some Muslims have one believe that one is not a real Muslim, other persons would have one believe that a Muslim cannot be a true American. So, the one-sided rhetoric exists on both sides of the equation. And honestly, all one has to do is be patient and introspect at the allegation or accusation and if then finds that one's conscience sits right, ignore the negative voices or naysayers.
Personally, as a Muslim, I don't spend my time or my energies concerning myself with what this or that person may think about my "Muslim-ness" because all I know is that I have to be right with God, and therefore everything else is just background noise to me.
I awant to thank you for the query that I seemed to read in between your lines, which I'd like to answer, and I also want to say I appreciate you sharing the actual text of the verse of the Quran as I have always felt that it is a poignant and ocean-deep verse. Well, yes, in the Quran, the context itself refers to the Children of Isra'il, Muslims have historically and traditionally understood the verse to apply to how Muslims should conduct themselves. Muslim is one who "submits His will to God." You have to understand that Islam is set as a criterion by which to distinguish right and wrong, understand the forbidden and also how to conduct oneself in such a manner as to not be tempted into the forbidden, and also a means of using mental intellect and spiritual intellect to attain perfection in character and manners. Muslim scholars have used the verse as a means of juxtaposing the behavior required of believers to the behavior seen in organizations or individuals that commit
un-Islamic actions like the one in San Bernardino.
For example, read the review of the
fatwa (Islamic ruling) on the matter of attacks like we see in our modern time: