The post I was responding to said . .One of the goals of Blue Lives Matter has been to add violence against police officers as a hate crime, something that appears to equivocate a chosen profession with characteristics more innate to a person's life, like ethnicity, biological characteristics, or sexual/gender identity. Since cops, while certainly targeted by individuals, are not a traditionally mistreated group and have been used to enforce a status quo that has included racist laws, this could easily be seen as an opposing reaction to a movement against racially motivated police violence. Especially when "All Lives Matter" folks will differentiate between Blue Lives and All Lives, but not Black Lives and All Lives.
. The implicit message of the group is "blue lives matter (as opposed to black lives)."
. . . as if it has to be one or the other, ie., that people can't or shouldn't care about both, or that a declaration of support for one is an implicit declaration of opposition to the other.
Nothing in your post explains or justifies that attitude.