The Scriptures make it very clear which things are right and which are wrong.
Make yourself a list of all the cases where politicians and the 'great and the good' are telling us that X is right or Y is wrong and this completely contradicts God's Word.
Now, all you have to do is to identify which political parties are most likely to embrace the majority of these horrors.
In Mark's Gospel Jesus tells us that 'blasphemy against the Holy Spirit' is 'the [only] unpardonable sin'.
Some have asked what this means but Jesus explains clearly. Seeing The Holy Spirit in Jesus the pharisees had recognised Him as being 'Beelzebub' thus reversing good and evil.
Look again at this rather pointed verse from Isaiah against such a backcloth.