If God was not made evident in creation as you claim against the very words of Scripture, they would have an excuse. But they do not.
To a spiritually dead person, that which is evident, cannot be correctly understood or perceived though evident -
and all of the unsaved are spiritually dead - to include those of the verses you posted.
Christ specifically is the focus of those verses - they are not a general independent discussion of God apart from Christ.
He alone is the Saviour, so besides obtaining justification by Him, there is no excuse possible, nor could one be offered,
so therefore, those verses could only be speaking of Christ.
Look, I'd really rather not have to go through each of those verses, so hopefully it will suffice to say that
when taken in context, they are about Christ, even though at first blush they may seem not to be - I know that they are
not easily deciphered.
They are set-off with the following verse. It lays the foundation and the borders for the subsequent verses, and which verse they
tie back into. I believe they should be understood within the context of Christ as Saviour as Paul so tells us in verse 15.
[Rom 1:15 KJV] 15 So, as much as in me is, I am ready to
preach the gospel to you that are at Rome also.