Correct! Those who use Constantine against the Catholic Church are historically inaccurate.
All one needs to do is listen to the words of Saint Hilary of Poiters- who was far more influential than Constantine.
From Saint Hilary of Poiters
But nowadays, we have to do with a disguised persecutor, a smooth-tongued enemy, a Constantius who has put on Antichrist; who scourges us, not with lashes, but with caresses who instead of robbing us, which would give us spiritual life, bribes us with riches, that he may lead us to eternal death; who thrusts us not into the liberty of a prison, but into the honours of his palace, that he may enslave us: who tears not our flesh, but our hearts; who beheads not with a sword, but kills the soul with his gold; who sentences not by a herald that we are to be burnt, but covertly enkindles the fire of hell against us. He does not dispute with us, that he may conquer; but he flatters us, that so he may lord it over our souls. He confesses Christ, the better to deny him; he tries to procure a unity which shall destroy peace; he puts down some few heretics, so that he may also crush the Christians....-Saint Hilary of Poiters
Indeed, Constantius played a much large role because he pushed not so much Arianism as semi-arianism, which used the words of Nicaea but emptied them of their force. It was the moderist heresy of their time.