"The class in —— who have been drawing off from the body have possessed a hard, bitter spirit against those whom God is using as His instruments to bring His people up united upon the only true platform. Their spirit is opposed to the work of God, and their influence has brought reproach upon the cause of God, and has made our faith disgusting to unbelievers, and caused Satan to exult. Those who are walking in church capacity and trying to serve God, may for a time be annoyed with those among them who are not right, and who have been shown me as self-righteous and pharisaical; but if they are patient, and walk humbly before God, earnestly praying for His power and Spirit, they will advance, and those who are unsound in the faith will be left behind. 1T 333.2"
"For the name of God is blasphemed among the Gentiles through you, as it is written."
The EGW quote describes behavior that brings reproach upon the cause of God, which aligns with the idea in Romans 2:24 that the name of God is blasphemed through the actions of believers.
"Even so ye also outwardly appear righteous unto men, but within ye are full of hypocrisy and iniquity."
The EGW quote describes a class of people who appear righteous but are not, which is the central theme of Matthew 23:28.