mustardseed revolution

Again, inspired from Irresistible Revolution:
So Jesus tells a story of a mustard seed being planted in the garden. He does this in Matt 13. Here's the thing, mustard was not supposed to be planted in gardens and the jews who he told the story to knew that. But he goes on to say that the seed grows and become the largest in the garden, so large fowl of the air perch in its branches.
Now I'm picturing a big oak tree with an eagle in it over shadowing the rest of the garden, that's how I preached it earlier this month. That's the kind of kingdom imagery the Jews had in mind as well. But after doing some reading I see that a mustard tree (bush) isn't large in stature at all but it speads like wild fire! Similar to yeast in a batch of dough! It would take over all the plants in the garden so all you would have is mustard.
Those listening would have either laughed our been ticked because they knew Jesus was talking about the Kingdom of God. They thought it would come as something large like the Cedars of Lebanon. But Jesus says its coming as something small! If that were'nt enough, Jesus add's the "fowl" part. He's not talking about mighty eagles here, he's saying the detestible birds of the air (the undesireables in the world) find refuge in its branches. I love it! God uses the foolish things of the world to shame the wise. He has a divine conspiracy to take over the world subtly through small pockets of people who love others and love God. Are you a part of it?