According to the Bible there are Pseudo Christians

By the way, I referred to the professed Christian as a pseudo Christian because that's the language of the Bible:

2 Corinthians 11:13 For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.

The Greek word translated as "false apostles" is a compound word pseuda-postolos (Strong's #5570) – we can clearly see that we have gotten our English word pseudo from this Greek word.

The Bible also speaks of "false brethren" in the same chapter:

2 Corinthians 11:26 ... in perils among false brethren;

The Greek word translated as "false brethren" here is pseud-adelphos (#5569).

There is also another compound word for false teachers:

2 Peter 2:1 But there were false prophets also among the people, even as there shall be false teachers among you, ...

"false teacher" is pseudo-didaskalos (#5572).

Similar compound words are translated several other times as false prophets, false witnesses, and false Christ's, etc.

The Greek word pseudos (#5579) itself is translated as “lie,” or “lying” – two times in:

2 Thessalonians 2: 9 Even him, whose coming is after the working of Satan with all power and signs and lying (#5579) wonders,

10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.

11 And for this cause God shall send them strong delusion, that they should believe a lie (#5579):