@sanka_s @Fasgadh @Richard_Littler Yip. Religion is a tricky one, because people do get super passionate about it, and some religions (notably Christianity) actually explicitly require their adherents to go out and tell the world.
But you know what? There's productive and unproductive telling, and ramming your beliefs down someone's throat, constantly telling them that they're wrong, judging and condemning people, is very unproductive indeed, and I believe many people have been completely turned off religion because of it.
I'm a Christian, but what I've learnt is that it's not my job to make you believe, and that showing is better than telling. So yes, I'll mention to you that I'm a Christian (I just did), and then I'll just... be here, living my life, trying to live out my convictions as best I can -- and getting it wrong sometimes, because I'm human -- and just... making myself available.
I think that's far more useful than responding to every interaction by reminding you that I'm a Christian and telling you what (my opinion of) Christianity says about everything that you do and say to me, all the frickin time, without ceasing, when you never asked.
At some point, you're not going to want to associate with me anymore. Or worse: at some point, you're going to be so turned off the idea of Christianity/religion in general that you're going to turn into a militant atheist.
You're right, this is exactly the same as someone telling you at every opportunity why Amazon is bad, or why they're a vegan, or why Star Wars is better than Star Trek, despite the fact that the person you're telling strongly believes otherwise.... :-)