It was not that Ye Tian Yun had any vendetta against Hu Xing or something. But rather, Ye Tian Yun just didn't wish to cross his path. While Hu Xing may have low cultivation in comparison to him, Hu Xing knew about people who had cultivation with the power to level the whole sect.
Ye Tian Yun was still alone, he didn't and he couldn't let others know of his goals. The last thing after the rebirth he wanted was to get betrayed by his own allies.
His only goal was to get all the Tokens, kill their owners, receive the Emblems and summon the God Emblem of Authority to crown himself as the Heavenly Emperor.
He didn't wish to entangle and get himself distracted in the politics of the sect unless he had no other choice.
Just as Ye Tian Yun was lost in his thoughts, another commotion attracted him. This time the disciples were most loud while discussing the disciple who had just entered the Hall.