Pastor MacArthur’s perspective is that of God’s, as expressed in His Word, The Bible. Per Jesus, if you have not accepted Jesus Christ as your savior, you are destined for hell, not heaven. Thus, the only “true” religion is more of a true relationship...a relationship with God through your relationship with His Son, Jesus. If you have not accepted Jesus as your savior, your “afterlife” on earth, which will be for eternity, is going to be hot and full of misery.
That dire message is True, as I myself teach, and thank God Pastor MacArthur calls souls to repentant faith and obedience to the risen Lord who saves sinners on His account. But the issue is not supporting freedom of religion since that would mean supporting the right to use it to preach error as well, and since he holds that supporting freedom of religion it itself wrong then he cannot supporting allowing that to be preached. Which as said, means that the only governmental freedom of speech he can support is that of a theocracy that does not disagree with anything he teaches otherwise it means Christians cannot have freedom of speech that is held in common with the general public, even if it allows more freedom to preach and an even playing field, and thus the American church has been wrong for supporting the first Amendment.
Meanwhile he himself is appealing to constitutional protections for freedom to meet. But we do not to have the faith of the NT church, in which our preaching is illegal, even though I think it is right to support the manner of freedom of speech that the great revivals in America occurred under. .