It it legal for us foreigners to stick our noses in Taiwan politics? or will that get us deported?

That’s great, until someone gets deported.
I am totally in agreement with MM on this one. The law in the ROC says a great many things. And a great many things happen in the ROC. The two are not always, er, mutually congruent.
There is such a thing as being “dead right”, for example, if you are separated from your wife for a year or more because you were deported.