The protestants understand scripture differently. They confess to each other, they get baptised and they might believe eating His body and blood refers to comprehending the love of Jesus whose flesh was torn and blood spilled and letting that change your life which is why Jesus said to remember Him till He comes. Therefore no one ought to take communion if he is living in sin as a lifestyle since how can one commemorate His death knowing he would be responsible for His death. But we know they are not right as in the book of acts we saw it was a practice done at certain times and Jesus said it was His body not a symbol and that only by taking that ordinance are we the body of Christ.
1 Corinthians 10
14 Therefore, my beloved, flee from idolatry. 15 I speak as to wise men; judge for yourselves what I say. 16 The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ? 17 For we, though many, are one bread and one body; for we all partake of that one bread.