Passage
And [again] he sent another, and him they killed; and many others, beating some and killing some.
And [again] he sent another, and him they killed; and many others, beating some and killing some.
Mark 12:3 But they took him, and beat [him], and sent [him] away empty.
Mark 12:4 And again he sent to them another bondman; and [at] him they [threw stones, and] struck [him] on the head, and sent [him] away with insult.
Mark 12:5 And [again] he sent another, and him they killed; and many others, beating some and killing some.
Mark 12:6 Having yet therefore one beloved son, he sent also him to them the last, saying, They will have respect for my son.
Mark 12:7 But those husbandmen said to one another, This is the heir: come, let us kill him and the inheritance will be ours.
The verse centers on "again", "sent", "another", "killed", "others", "beating", "some", and "killing". It is saying that the verse draws attention to "again" and "sent", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "And again he sent to them another..." into verse 6's "Having yet therefore one beloved son he...", so "again" and "sent" belong inside that flow. In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "again" and "sent" with trust shaped by these words, not by a vague optimism outside the passage.