Why are all the republicans trying to bring down Obama?

Apparently to GOP and its supporters. If you don't think like them, you're the enemy. You can't debate with them in a mature matter. They will attack and try to demonize you. Look at all the thumbs down dems get compare to cons just for voicing your opinion. All the tricks and smears for the last few years don't work anymore. President Obama won the election. Majority rules but the cons are still in denial and bitter. <3