In ways, yes. But you must not forget, 'missionaries' can come in various colours. For example, in India, there is a rift that exists between the Catholic, Protestant and Orthodox sects of Christianity. And missionaries of each sect try to outwin the other in gaining converts. I am aware that Catholics don't send their kids to Protestant schools and vice-versa. Hence the baggage.
However, true missionaries are always stay this.
Well that is absolutely correct. Orthodox tends to protect their turf, and so are Catholic, and even Protestant for that matter. Protestant, however, are typically the intruders in most of these countries, because they are the new comers and they seek market share. In the US, for example Protestants fight hard to keep their market share from getting eroded to the Mormons, and other new sects.
Religions, in general is very easily resembles market share protection or sport club fanatic supports. Don't you think?