Since there is currently no way and/or need for Jews to administer capital punishment to gentiles who violate the 7 noahide laws, is there any halachic reason for a Jew to care whether or not a non-Jew engages in homosexuality?
I am asking if there is any halachic basis to mandate that a Jew care (if you prefer 'actively object') about non-Jewish homosexuality today. If no such mandate exists, that does not necessarily mean the inverse is true (i.e. that you may actively accommodate this behavior).
To be clear, this is not related to chinuch or the desire not to be exposed and influenced by practices that are antithetical to the torah. I am asking this in a purely halachic context.