Le Canada devrait intervenir militairement dans les affaires des autres pays?

When asked by the UN, otherwise only as peacekeepers

Only when a sitting, democratically elected government, requests protective assistance from Canada.

Yes. However, only and when the "right to protect" has been clarified and made more consistent. Otherwise, isolationalism is the only obvious alternative.

Yes, for peacekeeping, request by UN and preemptive action against nations that threaten our security

Yes with peace keeping and UN. And increase the services available to veterans.

Yes, primarily for disaster response and peacekeeping. But we must maintain a strong, robust military for if situations become unstable.