I have no problem with the things in your oath. I'm not sure how I feel about taking a fealty oath though. I am completely loyal to this country but having to take a loyalty oath just doesn't feel right to me for some reason. I think I would have to sit down and think about it and sort out how I feel about it before I can say I'd take it.
Considering that every new citizen ~must~ take that oath, -- I'd say yes, you should think long and hard on just why it doesn't feel right to you for some reason.
And consider that our oaths of office, or of military service, say essentially the same things. 50/60 years ago draftees were forced to take that oath, and most all did so proudly.