They justify it as defending their way of life, which can align with Tolkien a little bit with some mental gymnastics

> I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend.

but overall Tolkien was against war, being a veteran of WWI himself, and the LOTR saga is about the heroism of the meek.

Peter Thiel clearly loves the sword for its sharpness, it drips from everything his companies do.