Friend I’m trying hard not to say something.
But, uh. Nah, no I’m not.
"Happy Valentine’s Day."
Which I’m now going to go out of my way to say to you, because you’ve been so abrasive and condescending in trying to command people NOT to say it, that I want you to hear this from a fellow Catholic before you go out there and say it to anyone else, possibly scandalizing them away from the Catholic faith:
The kind of bad behaviour you just exhibited in so abruptly and simplistically claiming that saying “Happy Valentine’s Day” shows someone to be “Not a Christian” is scandalizing, because it makes you look rude, irrational, and ties those things to the Church as if you’re speaking on behalf of the Church when you say it (which you’re not). You don’t get to arbitrarily tell others what to say and what not to say, and even if you think you have an argument that would benefit us to be guided by, you should have framed it more articulately and gently.
I really hope you haven’t said this to anyone in real life today. Because oh brother. Way to make people roll their eyes when they see you coming, and prepare for no one to want to listen to the next sentence when you might have actually told them something worthwhile and helpful to their salvation.
PS again, from me, a devout Catholic:
Happy Valentine’s Day.