accumulates or accumulate?

We experienced an analogy later in the game of Uno Stacko, which required team work and everyone’s participation. This is much like how the temple’s continuous growth needs everyone to participate and contribute, whether we can build and sustain a temple depends on the choices each of us makes. In this way, everyone is a pioneer, and each big or small cause we make accumulate/accumulates to become the future of the temple.

1. I believe it should be accumulates. Am I right?
2. Are there any errors in the text?

Thanks.