Final answer:
The main responses to the military activity in Iraq are a combination of civilian support and opposition, along with active resistance by insurgents and strategical challenges faced by the US military, leading to a complexity of both support for troops and growing anti-US sentiment.
Step-by-step explanation:
The responses to military activity in Iraq as described by Robin can be characterized by a mixture of support and opposition from civilians, as well as strategical challenges faced by US troops and their reactions. From the initial support as liberators, the growing insurgency and daily violence led to a more nuanced public opinion, including an emerging antiwar movement that nonetheless expressed support for the troops. This contrasts with the more active resistance of Iraqi insurgents who used tactics like IEDs against US forces and the civilian population. US military and civilian planners had anticipated many issues, but the advice was often disregarded, impacting the military response and contributing to anti-US sentiment. The manifesting responses ranged from active resistance among Iraqi insurgents to the civilian response of criticism and opposition, alongside some civilian cooperation and general support for US troops.