Dear Grace Seeker,
The fact of the matter is that some Muslims take it upon themselves to say that growing the beard is not a command, as you have seen we have Muslims who even don't accept Ahadeeth, sayings of our Prophet, peace be upon him, why? Because they tend to, and this is a rule of thumb, find something they disagree with and reject it, similarly with the beard, alot of Muslims seem to read one or two Ahadeeth and say "Ah, its not mandatory!"
For example, over at a Muslim website a brother has posted this and made his 'personal' views very clear.
Prophet Muhammad ordered Muslims to grow beards. But why?
Prophet Muhammad peace be upon him ordered Muslims to grow beards, because he didn't want them to look like the Pagans. It was important back then for Muslims to look different than the Pagans for both security and cultural reasons. By making it easier for Muslims to distinguish each others easily, it would certainly enforce safety and security among them. Also, by making Muslims be different than everyone else, it would certainly help them to give up their old Pagan traditions that they were raised with, especially when they're different than everyone else.
And the thing goes on and on, but I do have to say taht this brother, I do believe is neither an thorough student of knowlege nor a scholar. So this is what happens, people take a couple of hadeeth and then make up their own mind.
Am sure you are aware that in Islam we tend to look upto scholars, not blind follow them, but since they spend their life on studying our religion, it is likely that they will have a wider picture, and unlikely that they would produce a ruling based on a small part of the picture by mistakes as me or you would do from only having seen a couple of statements.
The fact that the Prophet, peace be upon him, orders us, if I am not mistaken makes it compulsry, unless someone can provide a solid reason for it not being compulsry, this is touched upon by Student of Knowledge Yasir Qadhi, in Sciences of Fiqh, I think it is.
Personally if someone told me this, then I would just tell them that the Qu'ran says, if I am not mistaken, "Fast that you may attain taqwa" so would that mean that someone can say 'I don't have to fast today, I've got enough taqwa' or the Qu'ran says, again if I'm not mistaken, "Salah prevents wrong doing" or something like that, so is it again ok for someone to say 'Don't pray salah its only there to prevent you from wrong doing, if you don't do any other wrong then you can avoid praying it'
(someone tell me if I got the quotes wrong, cos Im quoting partially from memory)
I hope this kinda makes sense.
Eesa.
It also had to do with differentiating from women, the last Prophet himself said that shaving it all was for effeminate men