There's no need, none of those True Gods would want to offend Zhou Tian. However, given the circumstances at the time, with Zhou Tian approaching their Divine City, regardless of his intentions, the first thought of those True Gods at that moment was always to repel Zhou Tian. Only by not letting Zhou Tian have any opportunity to approach their Divine City could those True Gods feel at ease.
Thus, before Zhou Tian exposed his strength, he could do as he pleased, even if he entered that True God's Divine City; that True God would show no reaction until his presence was uncovered. But now, aware of Zhou Tian's existence, that True God couldn't tolerate Zhou Tian remaining there any longer.
Obviously, Zhou Tian could not retreat obediently; at least at that time, the True God believed that Zhou Tian, no matter why he came, would not retreat on his own, without knowing what Zhou Tian had done in his Divine City previously.
