It is not that atheists do not like religion, it is that atheists do not like it when the religious tell them how to live their lives, or when theists imply that they are better people because of their beliefs: the idea, for example, that faith is a virtue of itself.
Nowadays, in the West, the theists who do these things are a minority - but still quite numerous. The argument about gay marriage, for example: theists saying that other people could not marry because of the theists rules. Wanting theologically inspired mottoes on civil institutions such as courts and money. Appealing to God in public ceremonies.