You are the joker hahahaa.. how is it possible that there is no genetic evidence that Serbs are conected with Croats when you clame that Croats are genetic Serbs.
Joke to the side, please show genetic evidence and historical records that support you clame, till then you talk fairy tales.
Proto-Croats were Turkic tribe possible Avars or Ogurs as Turkish historian Osman Karatay claims.
Haplogroup I2-PH908 came to the Balkans with Serbs in VII century. Serbs came to Balkans from modern western Czechia and eastern Bavaria, haplogroup I2-CTS10228 exist in western Czechia and eastern Bavaria today.
Real name of Sorbs were Wends they were in the alliance with Serbs which lived south from them, because of that Wends adopted Serbian name.
Sorbs don't call themselves Sorbs, they call themselves Serby [video]https://dsb.wikipedia.org/wiki/Serby[/video]
Croats came to the Balkans as Turkic tribe probably as remains of Avars, few Turkic Croats it imposed as elite to Slavs and local Slavs in part of western Balkans adpted Croatian name, similar as Turkic Bulgars and Slavs in eastern Balkans.
In VII and VIII century Croats were mentioned as non-Slavic people with weird non-Slavic names of their rulers such as Kluk, Muhol, Lovel, Kosen, Tuga, Vuga...
Proto-Croats were Turkic without any doubt, deal with it.