Is that what we're out to do?

这就是我们要做的吗？

That's not what I was out to do.

那不是我要做的。

Why can't people stand up and do the things they're out to do!

为什么人们不能站起来做他们想做的事情！

There are actually two expressions here: " To be out to do (something)" means to try to do something;" to get (someone)" means to attack, hurt, or perhaps even kill someone.

这里实际上有两种表达方式：“To be out to do (something)”是指尝试做某事；“to get (someone)”是指攻击、伤害甚至杀死某人。