No. Not a crime.
I write this as a person who received a ton of abuse growing up, simply because I was "different". Some because I was poor but most because I was gay. Not even effeminate gay, simply preferred boys to girls.
Freedom of speech is one of our most important freedoms in those countries that have some semblance of it.
If we don't like something, it is important to be able to say so. If we want to fund an organisation that supports our views, that should be our right. How would the "gay rights" movements had fared if no one was ever allowed to speak out, organise, fund events and so on? Or even earlier, the anti-slavery movements? If it was even illegal to make comments in support of these things, where would we be today?
If I find someone spouting anti-gay drivel somewhere, I get the chance to do something about it. Their freedom of speech gives me a chance to do something to challenge and maybe change their views (and I have been able to do so in some cases). Giving people a public place so say what they wish gives some chance of those views being challenged, but where people are forced to bottle up their ideas, or only speak of them in very closed groups, well.. When people form small groups and say what is truly felt ONLY in those places it reinforces the "us vs them" attitudes and strengthens their view that what they believe is right and everyone else is wrong. Sometimes this can lead to violence against others, as is supposedly seen with some far-right groups and the likes of the KKK (I say "supposedly" because I only have western media to go on, and lets just say that the NZ news media are not fans of accurate reporting! - and I am also aware of claims that some law officers have carried out "false flag" type events to give the other side a worse name (not saying I believe them all just that I believe it is possible)
It would be better for everyone if things could be said openly, and freely. In direct bullying of an individual then sure, FB et al should act to help out, but the ability to block such messages by individuals rather than to have the abusers cut of should take precedence.
And again, I write this as one who had at least planned suicide before my 10th birthday, as a result of what I was being put through by my peers.
Wish I'd got on to this article when I first opened the tab nearly a week ago!