You think Protestants believe that baptism is NECESSARY for REMITTANCE OF SINS? Really? I don’t think so. And the question remains to you. If you ever stumble across the answer let me know. It’s VERY important. I would think since water baptism for REMISSION OF SINS is important to your religion, this question would be important to you, as well. Or maybe you are one of those who just accept things those in authority say, because they are in, well, authority.
I spoke of the practice. I'm pretty sure I do know what the understanding is about baptism (and the Lord's Supper, for that matter.) I do know that Protestants reject the ancient beliefs about baptism. That's of no concern to me.
But, even with the rejection / disagreement, baptism is considered a normal part of a normal Christian life by the vast majority of Protestant Christians. Why do you suppose that is? Are they all in error on this and you are right? What else are they wrong about and how did they get the Bible so unrightly divided?