The message is a little backward, though.
Your acts, ie voting, don’t determine your salvation, but are a reflection of that state of your heart, and your salvation.
Someone truly “blood bought” would seek the will of the Lord and would not seek the advocacy based righteousness of voting for “social justice”.
I agree with your point but I believe that many Christians in this country are compromised and are teetering on the edge of becoming apostate and God is becoming weary of their condition as it effects the health of the Body of believers. This upcoming election is decision time for them: Life or Death. The vote for evil will affirm that fact and thus they become an unfruitful branch that gets pruned off the vine and then gets burned.
with this and other scriptures, God's Word is unambiguous that giving tacit approval to evil acts is the same as committing the act oneself.