[Mr. Lucky]

Protestants are not homogeneous.

In a congregation where the Lord's Supper is thought to be a quaint remembrance of an event from long ago, open communion would likely be practiced. In a congregation where the Lord's Supper is a Sacrament, and the Lord is known to be truly present, probably not.

[skeeter]

Can't speak for all, obviously, but I was raised a Presyberterian, attended a Methodist church for awhile, and for the past 20 years go to a non-denominational church.

All took communion as seriously as Christ himself intended for it to be taken, and non would've batted an eye if a catholic present took the sacrament along with everyone else.

[colorado tanker]

The Lord’s Supper is a sacrament in the Presbyterian Church. We believe that the Holy Spirit is present in the elements but do not believe in transubstantiation. Communion is open.

[Conservativegreatgrandma]

You are correct.