I oppose the act of secession because, in my deliberate judgment, the wrongs alleged as the cause of the movement might be redressed under the Constitution by an energetic execution of the laws of the United States, and that, standing upon the guarantees of the Constitution, in the Union, Southern rights might be triumphantly maintained under the protection and safeguards which the Constitution affords. –“A Protest against the Ordinance of Secession,”
James G. Taliaferro

Why does Taliaferro oppose Louisiana's secession from the Union?

He is worried that the Constitution does not safeguard states that secede.
He believes that the Constitution protects the rights of Southerners.
He believes that the Union will triumph despite the current chaos.
He is concerned that the state will not be able to lawfully protect its people.