Christians, can you admit that not all who claim to be Christian are good?

Yes I admit that there are many of among us of that sort but there are good and bad in all. I leave the sorting to God.

Someone can be Christian and be a bad person, or claim to be Christian while not actually believing the things which are necessary to Christian legitimacy. Christians are not automatically accepted and assumed to be above criticism; on the contrary, our faults are more pronounced due to our aspirations to righteousness.

Yes. Not everyone who claims to be a Christian actually is one. True Christians are made good because Jesus shared His righteousness with us.

The Christians that are supposedly "false" aren't Christians at all. they should know better than what people see them do. The "mature" Christians are those you run into and are isnpired by. You can tell the difference by how they act and react to situations. If they fear God and base their actions on what they know is right then they are "mature." most Christians just say they are Christian because they think it is the easiest religion to be apart of.

Well, you can see who the real Christians are by the way they act. Those who are really a Christian will want to obey God because they love Him. So, they would follow the BIble. Now, Christians still make mistakes because we aren't perfect. But we try to follow God.

Jesus said "By their fruits you will know them"

That is, by the way they live their lives, how they treat their fellow man etc.

Jesus also said that not everyone who calls him Lord (claims to be a Christian) would make it into heaven, only those who do the will of his Father: feeding the hungry, clothing the naked, visiting the lonely, and healing the sick.

Anyone of any belief system can be a bad person. Anyone of any belief system can lie about their beliefs, be hypocritical of their beliefs, or miserably fail to live their beliefs.

Anyone of any belief system. Christians would indeed be a subset of "anyone of any belief system."

Yes.

Christ Himself said "No man is good"

A "true" christian is any christian whose bad behavior has not yet been exposed.