Well, Bleeding Hearts would prefer it that we all say "Happy Holidays" instead of Merry Christmas.

I find this somewhat interesting, because I'm always hearing people bombast "bleeding hearts" for making everyone say "happy Holidays", and yet I've scarcely met anyone who has made any such insistence. Where are all these bleeding hearts? Who is saying we should say "Happy holidays" instead of "Merry Christmas"? Who is saying this? It's a grand strawman.

People that do say "happy Holidays" say it because in some instances it's easier, especially if you are unsure of a person's religious affiliation, but also because it includes the New Years as well.

All in all, I see people (mostly conservatives) make way too big of a deal over this, and I'm tired of hearing this rhetoric. If someone wants to say happy Holiday who the fuck cares? No one is making you say it.

Interestingly, Holiday means "Holy Day". This means that Bleeding Hearts are forcing everyone to celebrate Holiness (which comes from spirits and God and gay shit like that).

That was the original meaning, yes. Words however, are not static. Words however can acquire new meanings over time. Holiday for instances has come to mean:

"A day free from work that one may spend at leisure, especially a day on which custom or the law dictates a halting of general business activity to commemorate or celebrate a particular event."

nobody celebrates Kwanzaa (unless they're pretentious douche-bags who take pride in their "who gives a shit" culture

Nobody except for about 15 million people.

Who would have guessed that people will react when explicitly called foolish?