If you want to know what modernism consists of, read “liberalism is a sain” and read the excerpts on what a liberal Catholic is. lol. THeir definition of liberal in the 19th century is almost what we call conservative today! For example:
"The degree of our offense towards men can only be measured by the degree of our obligation (105) to him. Charity is primarily the love of God, secondarily the love of our neighbor for God’s sake. To sacrifice the first is to abandon the latter. Therefore to offend our neighbor for the love of God is a true act of charity. Not to offend our neighbor for the love of God is a sin.
Modern Liberalism reverses this order.
It imposes a false notion of charity; our neighbor first, and, if at all, God afterwards. By its reiterated and trite accusations of intolerance, it has succeeded in disconcerting even some staunch Catholics. But our rule is too plain and to concrete to admit of misconception. It is:
Sovereign Catholic inflexibility is sovereign Catholic charity. This charity is practiced in relation to our neighbor when in his own interest, he is crossed, humiliated and chastised. it is practiced in relation to a third party, when he is defended from the unjust aggression of another, as when he is protected from the contagion of error by unmasking its authors and abettors and showing them in their true light as iniquitous and pervert, by holding them up to the contempt, horror and execration of all.*** It is practiced in relation to God when, for His glory and in His service, it becomes necessary to silence all human considerations, to trample under foot all human (106) respect, to sacrifice all human interests, and even life itself to attain this highest of all ends.
All this is Catholic inflexibility and inflexible Catholicity in the practice of that pure love which constitutes sovereign charity. The saints are the types of this unswerving and sovereign fidelity to God, the heroes of charity and religion. Because in our times there are so few true inflexibles in the love of God, so also are there few uncompromisers in the order of charity. Liberal charity is condescending, affectionate, even tender in appearance, but at bottom it is an essential contempt for the true good of men, of the supreme interests of truth and of God.* It is human selflove usurping the throne of he Most High and demanding that worship which belongs to God alone."
This is Liberalism which is a sin, which goes hand in hand with Modernism. in fact, I do not think you can conceive of a Modernist who is not also a liberal.
Our inflexibility is our Charity: For we will the good, which is TRUTH for all men out of love of God.
We DO NOT will some warm fuzzies in your general direction…

.
God first, NOT YOU. THat is true Catholic charity.