That there’s no mention of secession in the Constitution doesn’t rule out the power to secede. But the Articles of Confederation, which the Constitution replaced, enjoyed little more than treaty status — any one signatory could shatter the treaty. That a new pact with the explicit intent “to form a more perfect union” would have created an equally feeble bond seems counterintuitive. The Constitution was intended to be something binding and lasting.
People who are conservative in a general sense find it especially disturbing how the unintended consequences of government decisions ripple out into economic decisions, which in turn ripple out into societal change. As much as the secular complain about the influence that religion has on society, look at the influence that *government* has on society, and consider how unthinkingly it spends that influence.