I do not think so an insurgent/insurgency is an armed rebelling force that generally speaking is not able to face a larger opposing force via conventional warfare.
The United States fought an insurgency against the UK and won.
The word insurgent in and of itself does not imply the right or wrong side just the method of warfare employed.In Syria the people fighting against Assad are the insurgents to most subsim members in this case the insurgents are the good guys.
Also when it comes to nations and groups nothing is fully neutral everything has an agenda left wing right wing they all have agenda and sway things to some extent.
http://en.wikipedia.org/wiki/Insurgency
http://en.wikipedia.org/wiki/Fourth_generation_warfare