It is patent nonensense, if you take one article of Mosaic law and disregard the entirety of the Bible, especially the NT. The question of how the Mosaic law is required in the New Covenant and regarding Gentile Christians is a theological question. If you want to we can talk about that but that is off-topic to this article.
As important as the Bible is, Christianity is not the "Bible alon", regardless of what some Protestants (no offense, please) might think.
I'd like to ask you whether you posted a similar issue on "Criticism of Judaism"? Jews don't safrice pigeons (or other animals) nowadays. And they don't have the NT. Are you postin over there as well.
But if you want to really know about this issue, I'm prepared to answer your questions.