If you choose not to listen, your choice, your loss.
As for Republicans deciding based on how they like his speechmaking or not, the Republican Establishment is terrified of his abilities. They HATE him for his abilities because they don’t want his Conservativism to WIN.
That’s how twisted things have become.
And just so you’ll know, the same type of GOP Establishment actually hated Ronald Reagan. They tried and tried to stop him but the majority of all Americans liked him so much, the Republican E of that day could NOT stop him.
Here's part of what I mean about "being an effective speaker": Reagan had probably the same amount of scare thrown at the Republicans by big media but he was able to sooth their fears. I remember being a little embarrassed at the things he had to say while doing so. To me it was borderline dishonesty but that is what you have to do. Remember, conservatives are a minority and once Cruz starts to campaign he might not seem to be the Cruz you remember all the time if he needs to attract the know-nothings.