Seeing his "teammate" charge into the front line, Liu Zilang was afraid that these "teammates" of his would catch on and attack him even though he really wanted to head up and help them.
The reason he was able to mix in with their big loving family without getting caught at the foot of the slope was that the big loving family was too focused on attacking the enemies by the bridgehead. Furthermore, they were all in the same line and he had perfectly overlapped his position with the enemy's teammate in the minimap. This was also a reason why he was able to mix in so well with his enemies to fight the other squad.
However now that everyone had spread out, he would be an idiot if he were to raise his weapon and charge in.
Instead of insulting the enemy's intelligence, it would be an insult to his intelligence instead.
He would probably be shot to death like an idiot while he was halfway through!