“the Christian conception tells us that one must always distinguish the respect due to persons, which involves rejecting any marginalization of them in society and politics”
The Cardinal is making this up. We have an obligation to “marginalize” persons who engage in various behaviors. This double-minded approach to unrepentant sodomites is cowardice and will fail.
The Church needs to show more courage and be less afraid of “offending”.
John tells us how to treat them rather clearly.
2 John 7-11 7Many deceivers, who do not acknowledge Jesus Christ as coming in the flesh, have gone out into the world. Any such person is the deceiver and the antichrist. 8Watch out that you do not lose what you have worked for, but that you may be rewarded fully. 9Anyone who runs ahead and does not continue in the teaching of Christ does not have God; whoever continues in the teaching has both the Father and the Son. 10If anyone comes to you and does not bring this teaching, do not take him into your house or welcome him. 11Anyone who welcomes him shares in his wicked work.