Every group of people has a common history, a story, that ties their identity together, that defines who they are and who they are becoming. For the Israelites the story that gave them purpose was the Passover feast, the phenomenal story of how God rescued a nation from slavery.
It goes like this:
On the tenth day of the very first month a family picks out a lamb and for four days they take care of this lamb, and nurture it to understand what it would be like to sacrifice something that you have grown attached to. Then, on the fourteenth day, the blood of this lamb is applied over the door posts of the house, as the Spirit of death and brokenness passes over the house, sparing the family inside. This is to be done as a remembrance of the Israelite's deliverance out of slavery.
Fast forward:
On the night Jesus gave himself up for the healing of the world he presented the cup and said, "this is my blood poured out for the forgiveness of sins." He then took the bread, broke it, and said, "this is my body given for you."
That is why the Riverside Community celebrates the Passover feast because we have been spared from the Spirit of death and brokenness through Jesus, the lamb of God.
There is new blood, but this time it is over the door posts of the whole universe for the salvation of all.