There is a time and place for standing up for what you believe in.  Indeed, there are lots of them available.  Bringing politics to the work place is not one of them, regardless of how much of a knob Trump is.

I don't like national anthems at sporting events or school Christmas concerts.  But when the announcer says "Please rise for the national anthem", I do that out of respect for the country and the lives of those who fought for our freedoms.  And at Remembrance Day ceremonies, I bow my head for the inevitable prayer(s) even though I am an atheist, because it is a sign of respect.  I don't "take a knee".  I can take issue with what Canada or religions have done in the past, but that's not the right time or place to do it.