When you disagree with something, it's very difficult to not get passionate about it.
We take pride in debates and arguing our perspectives.
Try to resist the temptation. What is the worst that will happen?
I am able to remain calm most of the time because of one simple question I remind myself constantly:
What if I didn't hear that?
This reminder puts the bigger picture in the frame. If one person thinks this thought, then surely others do elsewhere. Knowing this, how will exhausting energy against one accomplish anything?
I'd much rather keep thinking about the next thing others will eventually disagree with.
That's just a part of the process.