Assalaam walaikum,
Words are the most powerful weapon we have. That is why dua is so important. We have to be careful with our words. Given the language differences, cultural contexts, and knowledge of the faith, and the biggie, the maturity level of the writer and reader..we need to revise our thoughts to reflect exactly what we mean.
It came across as a little haughty. That is the only reason I questioned the intent.
I can not for the love of Allah say or assume that a persons faith is shallow. The Prophet, may the peace and blessings of Allah be upon him, changed the world with Love. He did not point fingers..it is a process to start walking towards the Path and once on the Path it becomes a marathon.