Come on now. John Calvin oversaw, IIRC, 300 missionaries to France. William Carrey moved to India and witnessed for 7 years before having his first convert to Christianity. He also lost a wife, and I think, two kids to illness.
We have had three churches that are reformed come to my area as missionaries and they are as missionary as they come. I can give you their websites in a PM if you wish to read what they believe.
A solid Calvinist is a Missionary Calvinist.
Good solid Calvinists have always been very missions-focused, and very evangelical.
Now, I'm not sure why, and I'm not at all convinced it's philosophically consistent.
In fact, I've heard reformed preachers say, "I don't have a good explanation for why I must evangelize if all the people who are getting saved are completely predestined to get saved regardless of what I do... but God said to evangelize, and so I do it."
To me that's a weird, but a very honest, and very faithful answer.
Now, if somebody's only reason for evangelism is just that God said to do it,
that may seem weird to me personally,
but I really can't find any fault there.
If a man is being faithful to God, then I should appreciate and respect that.
Again, I'm not convinced it is really philosophically consistent...
but I just can't find any fault with a person faithfully serving God and preaching the gospel.
To me... this is all really interesting.
In my own personal experience, I find that Calvinsts and Arminians who are genuine believers, all get up each day and live their lives pretty much identically.
This isn't to say doctrine is unimportant; the bible says it is.
But if we are all being led by the spirit, and being conformed to the image of Christ... we're going to end up doing a lot of the same things.