I have considerable difficulty responding to general philosophical statements like this, so could someone provide me with a scenario in which individual autonomy actually threatens collective security?
Basically what this question asks you is, do you value the community more than the individual, or the individual more than the community? Do you put moral weight on the individual's ability to self-govern, or should you be guided by external forces like government and society? I suppose one scenario that this question could apply to is taxes: should we surrender some of our autonomy (our complete ownership of money) in exchange for security, or should we not?
To understand which side generally agrees with what, check out the comments and Political Matrix scores of the posters here.
It's probably too much to explain in one post, though.