Pluralism teaches that there are many roads to God, and that no road can be said to be the exclusive one. In a modern culture that promotes acceptance and tolerance, pluralism is gaining in popularity.
The problem with pluralism is, in spite of its claim to be tolerant, it is actually intolerant, particularly of Christianity, which promotes an exclusive view of its path to God through faith in Jesus Christ. However, it seemingly turns a blind eye towards Muslims, who force conversions through use of the sword, and Hindus, who persecute those who leave its ranks. Staunch adherents of such bodies are exclusivists as well.
Further, pluralism ignores truth as nonessential. All religions, in fact, do not teach the same basic truths. How can we reconcile monotheism (Christianity), polytheism (Hinduism), and atheism? If everything is relative and there is no absolute truth, then even that statement is not absolutely true. Common sense demands the existence of truth, and, beyond that, the fact that everything differing with that truth constitutes falsehood.