I can agree with some of what you say here. However...respectfully, where the Bible clearly speaks Christians can speak. And it clearly says that those who don't come to Christ and believe on Him won't be saved therefore any Christian has authority to say that those who come to Christ will be saved and those who don't won't. I don't agree with this "I'm ok, you're ok" philosophy that's been around for quite some time. Those lost outside of Christ are not ok. Nor do I think it's ok to be haughty or arrogant in presenting the truth. I try not to be but I'm sure I don't always succeed. There are those who are better at saying things than I am.
Here's a little something about Christians and making judgments.
I personally believe that there are those of faith that are not Christian who are just as loved and accepted by their higher power and who in their daily lives treat others as a higher power would wish them to do. I am not, however, going to try to convert anyone else to my way of thinking as I believe my connection with my higher power is a personal one and the only authority I have to answer to. And further, I believe there is a place for all those interpretations of spirituality to co-exist.