We disrupt the Western-prescribed nuclear family structure requirement by supporting each other as extended families and “villages” that collectively care for one another, especially our children, to the degree that mothers, parents, and children are comfortable.
I don't think this is entailed in the general idea of supporting black people and equal rights.
There are plenty of other goals on that page that are similarly not obviously entailed.
Personally, I would doubt whether many of the people endorsing the position that black lives matter are even aware that an entity controlling this domain name is stating these positions, let alone that they concur with all of them.
https://blacklivesmatter.com/what-we-believe/
It's not very well formatted, but you can skip about half-way down and look for text that seems like a list.
You didn't "lose" (passive voice) friends, you actively decided to not be friends with them. That's on you, not them.
> I don't know how people can be anti-BLM .... How can I be friends with them?
You could try to understand why they express the views that they do. Presumably they aren't full of hatred, or you probably wouldn't be friends in the first place, which means they probably have a reasonable view, even if you disagree. The more your friends have to agree with you on everything to be friends, the fewer friends you'll have. Personally I think that shared interests and values and ability to have healthy conflict are more important than agreement. Plus, you'll grow more as a person if you don't live in an echo chamber.
Edit: "racial justice" would have been a better choice than "equity".
Using #DefundThePolice as an example... it seems obvious that something needs done but https://blacklivesmatter.com/defundthepolice/ doesn't make a convincing case about. There are a lot of people who are opposed to the status quo but don't see much value in that particular hashtag. Does that seem anti-BLM to you?
Equity means striving for an impossible, ever moving goalpost that will lead to oppression of many over time.
Equality of opportunity may not overcome the starting point, but doesn't seek to raise some and oppress others for actions that they didn't create.
Nobody should have to suffer, apologize or have their actions dismissed because of how they were born. We are all raised in different environments and all have to make our own decisions in life.
Our best option is to spread knowledge and points of ethical example.
People should read both MLK and Malcom-X and consider them before trying to raise a PoV about status quo vs change that may actually be worse for everyone. I'm not entirely in favor of the status quo, but that doesn't mean that changes proposed have any more value in terms of improving society as a whole.