The first link in the OP wouldn't open for me.
I (mainline Protestant) also had never heard of the saying, but that's not surprising if, as the second link in the OP suggests, it comes out of the Pentecostal or charismatic traditions. That link is itself a very conservative source, but I think it's correct to say that it's evidently a phrase from (modern) charismatic religious practice rather than from scripture.
A little background for harambee and others, since Robert -- US is evidently no longer with us to comment on religious questions ...
Pentecostalism, also known as charismatic worship (from the Greek roots of charism, charisma,
meaning a grace or spiritual gift), is a largely modern evangelical movement that started in the US in the 20th century and has now spread widely in the developing world and the global south. It features emotional, experiential, movement-filled worship, with people often raising their open hands into the air to receive what they understand as the Holy Spirit, as the apostles were said to have done on Pentecost as described in the book of Acts (though other traditions may read the story more as a parable or metaphor). In worshipers' perception, this spiritual gift is manifested by speaking in tongues (glossolalia
) and by healing through faith, which in turn enables them to bring people from different backgrounds together, in one of the first American religious movements to bridge racial barriers, which has been a powerful force in growing the movement worldwide.https://en.wikipedia.org/wiki/Pentecosthttps://en.wikipedia.org/wiki/Pentecostalism
But of course nothing in Christianity excuses violence against democratically elected representatives such as the recent Capitol riot. It was appalling to me that some of the videos showed rioters supposedly praying before storming the building.
If anything, the blood of Jesus might refer to those like the Capitol police officer who were killed or hurt by an angry mob for no good reason. Christianity does teach, broadly speaking, that God is on the side of the victims and those who suffer.