Fruits don't mean followers, by the way...just a note there. You might want to research that more...He was speaking about actions.
Going to your point about how I can judge...
I've often noticed something poignant in life, when I've given someone a gift...and they don't open it. They ignore it. They don't even acknowledge it, and claim to be too busy to open it...etc. But, then I see them busy doing other things...this tells me, they are just not interested in my gift. Or in me, really.
But, then, they are confusing, because they will say flowery words in hopes that I don't notice that they don't really care about me...and then, I believe them again. Then, the behavior starts up again. Rinse and repeat. lol
If you care about someone, you care to open their gifts. Actions at the end of the day, ALWAYS blare louder than words.
''You'll know them by their fruits......''
I also hold said people who claim to be christians, to a higher standard. If someone touts that they follow Jesus, but treat me with little regard...I honestly stop believing they are following anyone but themselves.
Actions, robittybob....it's all about actions.