Wow. Pretty broad brush you have painted with there...
Evangelical is a term used to describe the various churches that believe in the Bible as absolutely true and absolutely authoritative on the things of God.
This definition includes several denominations and theologies, but the basic premise all of them agree on is that:
The Bible was divinely inspired by the Holy Spirit and reflects the Holy Spirit's words to the world. As such, it is infallible.
Evangelicals believe that the Bible means just what it says.
As to your other charachterizations, I ask you to examine the book of Acts. Would you describe the Apostles as being "silly with Jesus"? On the day of Pentecost, the 120 in the upper room they were filled with the Spirit, speaking in tongues, and worshipping God.
Men looked at these people laughing and worshipping and thought they were drunk. Peter said that these people were not drunk, but were full of the Holy Spirit. The very same signs (tongues, joy, etc) were repeated with EVERY FOLLOWING baptism of the Holy Spirit.
The manifiestations of the Holy Spirit bring about joy and laughter and tears and various other things. Remember that when the Spirit came upon David that he danced before the Lord with all his might, and embarrassed his wife? Remember that John the Revelator fell before the feet of Jesus as a dead man? Sometimes the Spirit can work upon someone to the point where an ordinary onlooker would think they were drunk. I have seen folks go from hysterical laughter to bitter tears and back again. If I didn't know the person I would think they were drunk.
It is true that there are people who just fall over and act a fool and that the Spirit has nothing to do with it. It is true that this is found in a lot of churches. It is true that in the name of not quenching the Spirit that many congregations do not properly rid themselves of nonsense like that.
But that is the counterfeit to the real. I cannot make a fake 20 dollar bill unless there is a real one. The existence of the counterfeit, cheap, man-made substitute that many people indulge does not lessen the reality of the genuine work of the Spirit. The work of the Holy Spirit is not limited to these manifestations as many people think, but sometimes they do occour.
I would remind you that no man who truly served the Living God was ever a moderate anything. Christ looked at the Pharisees and called them urns full of dead men's bones. He said that anyone who would follow Him must take up his own personal cross and loose his own life. He said that if anyone who wouldn't forsake houses, lands, or even family for the sake of Christ would be rejected by God.
Peter preached with fire and passion, and stood against the assaults of the religious leaders. He preached the truth and did not waver, even unto the point where he was crucified for his preaching.
Paul preached righteousness and liberty with such zeal that he was hated by the religious leaders who beat him almost to death on occasions, and stoned him almost to death on other occasions. All of the Apostles except for John were killed, and he was exiled. None of them compromised.
The early Christians faced almost certain death at the stake, or in the colluseum, all because they refused to compromise and worship the emporer.
The Christians did not attack people with violence, and they did not work evil in the name of Christ. But by the same token they did not love their lives unto the death. They held fast their confession of faith, and did not relinquish Christ or stop preaching the Gospel even under penalty of death.
That is hardly a moderate position.
It is impossible to stand for truth and righteousness without being militant. Jude urges us to contend earnestly for the faith that was once delivered to all the saints. Paul says that if any man preaches any other gospel, let them be accursed.
Jesus was not a moderate. Jesus was the most inflexible, unrelenting, unwavering person who ever lived. He never compromised on matters of truth and righteousness a single time. How can people who are supposed to conform themselves to Christ's example do any less?
Christ always preached the truth in love, but He nevertheless preached the truth. A true Christian can do no less.