That is what honest and objective people eventually come to recognize after they've studied our history long enough. Lincoln birthed our current Federal leviathan. Wilson grew it larger, as did Roosevelt and Johnson.
But there were no Maryland legislators jailed -- none, zero, nada jailed for any reason -- on April 29, 1861 when they voted four to one against (53-13) secession.
Then on May 6, 1861 the Confederacy formally declared war on the United States, bringing into effect the US Constitution:
This made pro-Confederates (aka "copperheads") in Union states treasonous, and subject to arrest.
So the vote on April 29 was four to one against secession and by September 17 would have been two to one against secession if the arrested pro-Confederates were allowed to vote.
And two to one is also roughly the number of Marylanders who served the Union versus Confederate army.
So Maryland, like Delaware, Kentucky & Missouri, was a Union state, period.
Antietam/Sharpsburg, Marylanders fought with distinction on both sides: