Has nothing to do with screaming. He needs to be consistent and tough, you are right. He also needs to convince people he is right.
Lately, he hasn't been doing that. That's all.
I honestly don't think he cares what people think. A leader makes a decision.
Unlike Clinton, who governed by polls, he doesn't need to have 51% or more of the country on his side to do what he thinks is right. He makes decisions and he sticks to them.
Reagan had the same attribute.