There is the type of man whose speech about this world’s life May dazzle thee, and he calls Allah to witness about what is in his heart; yet is he the most contentious of enemies.
Tafhim ul Quran writes:
“Such a person tends to claim again and again that he was merely a well-wisher and was simply striving to uphold what is true and right, and to promote the welfare of the people rather than doing things for the sake of personal aggrandizement.”
“The words aladd al-khisam mean ‘the most fierce in enmity’. This would apply to someone who concentrates all his energies on opposing truth, and who resorts to whatever falsehood, dishonesty, treachery and breach of faith he thinks necessary to achieve his end”
Moududi, Abu Ala. Tafhim ul Quran. (Surah 2 verse 204) https://www.englishtafsir.com/