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Uncle Owen is not afraid Luke inherited the cruelty of his father. He doesn’t even know Anakin became Vader, he thinks Anakin got killed.

Uncle Owen doesn’t hate Obi-Wan because they had an argument or because something happened between them while Obi-Wan was on Tatooine.

Owen Lars was handled a tiny fragile baby to protect, and told that this baby’s father, who was always restless on Tatooine as a child, who loved speed and flying, who brought his starfighters into the most dangerous battles, to whom there was never enough excitement and adventure, has gotten himself killed in a war he was so eager to fight in, and which Owen never understood. 

He watched over and raised this baby for 19 years. He is afraid. He is afraid when Luke becomes restless just like boy Anakin. He is afraid when Luke falls in love with flying, just like Anakin. He is afraid Obi-Wan will drag Luke off Tatooine, just like he dragged off Anakin.

He is afraid Luke will be like his father, never content to stay on their farm where it’s safe, but fly too fast, and fight too hard, and be too idealistic, and then get killed.

So when Owen says he’s afraid Luke has too much of his father’s in him, he is not worried Luke will be like Anakin, he is afraid Luke will die like Anakin.