That is a simplistic and misleading way of describing Arminianism's hamartiology and soteriology.
There is only a difference in degree between Arminianism and Open Theism. They are clearly fraternal twins but not Siamese Twins. IMO both diminish man's depravity and God's sovereignty in an unsuccesful attempt to rescue God from bad press and to soothe pastoral couseling perplexities.
As long as you are stating that that's your "opinion" of Arminianism, I'm not going to bother debating it.
Arminians who want to retain predictive prophecy and inerrancy stop short of a fully open view of God. Arminian is not Open Theology, but it is Theology Ajar!
You seem to think that predictive prophecy and inerrancy demands causation. Foreknowledge isn't necessity; in other words, just because God knows something will happen doesn't mean that God has caused (at least, actively) it to happen.