The Lotus Sutra doesn’t say to propagate Ikadaism, Nikkenism, Value Creationism, Holy Waterism, Kuan Yinism, nor even Nichirenism. It says to propagate the Lotus Sutra.

The word "propagate" is found, twice in three chapters (13, 14, and 22) of the Lotus Sutra:

“World-Honored One, leader and teacher,

you bring tranquility to heavenly and human beings.

We have heard these prophecies

and our minds are peaceful and satisfied.

The nuns, having recited these verses, said to the

Buddha, “World-Honored One, we too will be able to go to

lands in other regions and broadly propagate this sutra.”(Chapter 13)

“They rose from their seats, advanced before the Buddha

and, pressing their palms together with a single mind,

thought to themselves, if the World-Honored One should

order us to embrace and preach this sutra, we would do

as the Buddha instructed and broadly propagate this Law.

And then they thought to themselves, But the Buddha now

is silent and gives us no such order. What shall we do?”(Chapter 13)

“If a bodhisattva will at times

enter a quiet room

and with the correct mental attitude

will view phenomena according to the doctrine,

and then, rising from his meditation,

will for the sake of the ruler,

the princes, ministers and people,

the Brahmans and others,

unfold, propagate, expound

and preach this sutra,

then his mind will be tranquil, 

free of qualing and timidity (Chapter 14) 

“Manjushri this Lotus Sutra is the secret storehouse of

the Buddhas, the Thus Come Ones. Among the sutras, it

holds the highest place. Through the long night I have

guarded and protected it and have never recklessly

propagated it. But today for the first time I expound it

for your sake.”(Chapter 14)

“At that time Shakyamuni Buddha rose from his Dharma seat

and, manifesting his great supernatural powers, with his

right hand patted the heads of the immeasurable,

Bodhisattvas and mahasattvas and spoke these words: “For

immeasurable hundreds, thousands, ten thousands,

millions of asamkhya kalpas I have practiced this hard-

to-attain Law of anuttara-samyak-sambodhi. Now I entrust

it to you. You must single-mindedly propagate this Law

abroad, causing its benefits to spread far and wide.”(Chapter 22)

“Three times he patted the bodhisattvas and mahasattvas

on the head and spoke these words: “For immeasurable

hundreds, thousands, ten thousands, millions of asamkhya

kalpas I have practiced this hard-to-attain Law of

anuttara-samyak-sambodhi. Now I entrust it to you. You

must accept, uphold, recite, and broadly propagate this

Law, causing all living beings everywhere to hear and

understand it. Why? Because the Thus Come One has great

pity and compassion. He is in no way stingy or

begrudging, nor has he any fear. He is able to bestow on

living beings the wisdom of the Buddha, the wisdom of

the Thus Come One, the wisdom that comes of itself. The

Thus Come One is a great giver of gifts to all living

beings. You for your part should respond by studying

this Law of the Thus Come One. You must not be stingy or

begrudging.”(Chapter 22)

and in Chapter 18 we read,

in a place where the Sutra is lectured,

He encourages another to sit down and listen,

By virtue of his blessings, he will gain

The seat of Shakra, Brahma, or a wheel-turning king.

How much greater will the blessings be of one who single-mindedly listens

And explains the Sutra's meaning, 

Cultivating it as he preaches

His blessings shall know no limit.