You’re almost correct:

Vois comment les gens peuvent souffrir du terrorisme

But regarder is more appropriate to your situation:

Regarde comment les gens peuvent souffrir du terrorisme

In English, it means:

Look/see/observe how people can suffer of terrorism

You probably should tell what you intend to express as your sentence might be corrected in two ways, each one with a different meaning:

Regarde comment les gens peuvent souffrir du terrorisme.

Look at how people can suffer from terrorism (neutral: i.e. observe the way they suffer from terrorism.)

Regarde comme les gens peuvent souffrir du terrorisme.

Look how people can suffer from terrorism (sympathy: i.e. pay attention to how much terrorism is affecting them.)